diff --git a/src/fr/devinsy/sikevadb/SikevaDBLauncher.java b/src/fr/devinsy/sikevadb/SikevaDBLauncher.java
index 10fddfb..57e3735 100644
--- a/src/fr/devinsy/sikevadb/SikevaDBLauncher.java
+++ b/src/fr/devinsy/sikevadb/SikevaDBLauncher.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -30,23 +30,24 @@ import fr.devinsy.sikevadb.cli.SikevaDBCLI;
 import fr.devinsy.sikevadb.demo.SikevaDBDemo;
 
 /**
- * This class <code>SikevaDB</code> is the launcher.
- * 
+ * The Class SikevaDBLauncher.
  */
 public final class SikevaDBLauncher
 {
 	private static Logger logger = LoggerFactory.getLogger(SikevaDBLauncher.class);
 
 	/**
-     *
-     */
+	 * Instantiates a new SikevaDB launcher.
+	 */
 	private SikevaDBLauncher()
 	{
 	}
 
 	/**
+	 * The main method.
 	 * 
 	 * @param args
+	 *            the arguments
 	 */
 	public static void main(final String[] args)
 	{
diff --git a/src/fr/devinsy/sikevadb/cli/SikevaDBCLI.java b/src/fr/devinsy/sikevadb/cli/SikevaDBCLI.java
index db5739e..1331485 100644
--- a/src/fr/devinsy/sikevadb/cli/SikevaDBCLI.java
+++ b/src/fr/devinsy/sikevadb/cli/SikevaDBCLI.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -32,8 +32,8 @@ import fr.devinsy.sikevadb.core.SikevaDBException;
 import fr.devinsy.util.strings.StringList;
 
 /**
- * This class manage a Command Line Interface for SikevaDB.
- * 
+ * The Class <code>SikevaDBCLI</code> manages a Command Line Interface for
+ * SikevaDB.
  * 
  */
 public final class SikevaDBCLI
@@ -41,8 +41,8 @@ public final class SikevaDBCLI
 	private static Logger logger = LoggerFactory.getLogger(SikevaDBCLI.class);
 
 	/**
-     *
-     */
+	 * Instantiates a new SikevaDBCLI.
+	 */
 	private SikevaDBCLI()
 	{
 	}
@@ -65,8 +65,10 @@ public final class SikevaDBCLI
 	}
 
 	/**
+	 * The main method.
 	 * 
 	 * @param args
+	 *            the arguments
 	 */
 	public static void main(final String[] args)
 	{
diff --git a/src/fr/devinsy/sikevadb/cli/SikevaDBCLIException.java b/src/fr/devinsy/sikevadb/cli/SikevaDBCLIException.java
index 6705151..7565712 100644
--- a/src/fr/devinsy/sikevadb/cli/SikevaDBCLIException.java
+++ b/src/fr/devinsy/sikevadb/cli/SikevaDBCLIException.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -21,14 +21,14 @@ package fr.devinsy.sikevadb.cli;
 import fr.devinsy.sikevadb.core.SikevaDBException;
 
 /**
- * 
+ * The Class SikevaDBCLIException.
  */
 public class SikevaDBCLIException extends SikevaDBException
 {
 	private static final long serialVersionUID = 2986878456227891377L;
 
 	/**
-	 *
+	 * Instantiates a new SikevaDBCLI exception.
 	 */
 	public SikevaDBCLIException()
 	{
@@ -36,8 +36,10 @@ public class SikevaDBCLIException extends SikevaDBException
 	}
 
 	/**
+	 * Instantiates a new SikevaDBCLI exception.
 	 * 
 	 * @param message
+	 *            the message
 	 */
 	public SikevaDBCLIException(final String message)
 	{
@@ -45,9 +47,12 @@ public class SikevaDBCLIException extends SikevaDBException
 	}
 
 	/**
+	 * Instantiates a new SikevaDBCLI exception.
 	 * 
 	 * @param message
+	 *            the message
 	 * @param cause
+	 *            the cause
 	 */
 	public SikevaDBCLIException(final String message, final Throwable cause)
 	{
@@ -55,8 +60,10 @@ public class SikevaDBCLIException extends SikevaDBException
 	}
 
 	/**
+	 * Instantiates a new SikevaDBCLI exception.
 	 * 
 	 * @param cause
+	 *            the cause
 	 */
 	public SikevaDBCLIException(final Throwable cause)
 	{
diff --git a/src/fr/devinsy/sikevadb/core/Archiver.java b/src/fr/devinsy/sikevadb/core/Archiver.java
index 26829b1..dd68e10 100644
--- a/src/fr/devinsy/sikevadb/core/Archiver.java
+++ b/src/fr/devinsy/sikevadb/core/Archiver.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -19,6 +19,7 @@
 package fr.devinsy.sikevadb.core;
 
 /**
+ * The Interface Archiver.
  * 
  * @author Christian Pierre MOMON
  */
diff --git a/src/fr/devinsy/sikevadb/core/Element.java b/src/fr/devinsy/sikevadb/core/Element.java
index 3d21d46..c9b1e02 100644
--- a/src/fr/devinsy/sikevadb/core/Element.java
+++ b/src/fr/devinsy/sikevadb/core/Element.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -22,7 +22,7 @@ import org.apache.commons.codec.digest.DigestUtils;
 import org.joda.time.DateTime;
 
 /**
- * 
+ * The Class Element.
  * 
  * @author Christian Pierre MOMON
  */
@@ -42,9 +42,7 @@ public class Element
 	private String value;
 
 	/**
-	 * 
-	 * @param key
-	 * @param value
+	 * Instantiates a new element.
 	 */
 	public Element()
 	{
@@ -52,9 +50,14 @@ public class Element
 	}
 
 	/**
+	 * Instantiates a new element.
 	 * 
 	 * @param key
+	 *            the key
+	 * @param subkey
+	 *            the subkey
 	 * @param value
+	 *            the value
 	 */
 	public Element(final String key, final String subkey, final String value)
 	{
@@ -65,106 +68,207 @@ public class Element
 	}
 
 	/**
-	 * 
+	 * Archive.
 	 */
 	public void archive()
 	{
 		this.archiveDate = DateTime.now();
 	}
 
+	/**
+	 * Gets the archive date.
+	 * 
+	 * @return the archive date
+	 */
 	public DateTime getArchiveDate()
 	{
 		return this.archiveDate;
 	}
 
+	/**
+	 * Gets the creation date.
+	 * 
+	 * @return the creation date
+	 */
 	public DateTime getCreationDate()
 	{
 		return this.creationDate;
 	}
 
+	/**
+	 * Gets the digest.
+	 * 
+	 * @return the digest
+	 */
 	public String getDigest()
 	{
 		return this.digest;
 	}
 
+	/**
+	 * Gets the edition date.
+	 * 
+	 * @return the edition date
+	 */
 	public DateTime getEditionDate()
 	{
 		return this.editionDate;
 	}
 
+	/**
+	 * Gets the id.
+	 * 
+	 * @return the id
+	 */
 	public long getId()
 	{
 		return this.id;
 	}
 
+	/**
+	 * Gets the key.
+	 * 
+	 * @return the key
+	 */
 	public String getKey()
 	{
 		return this.key;
 	}
 
+	/**
+	 * Gets the size.
+	 * 
+	 * @return the size
+	 */
 	public long getSize()
 	{
 		return this.size;
 	}
 
+	/**
+	 * Gets the subkey.
+	 * 
+	 * @return the subkey
+	 */
 	public String getSubkey()
 	{
 		return this.subkey;
 	}
 
+	/**
+	 * Gets the value.
+	 * 
+	 * @return the value
+	 */
 	public String getValue()
 	{
 		return this.value;
 	}
 
+	/**
+	 * Sets the archive date.
+	 * 
+	 * @param date
+	 *            the new archive date
+	 */
 	public void setArchiveDate(final DateTime date)
 	{
 		this.archiveDate = date;
 	}
 
+	/**
+	 * Sets the creation date.
+	 * 
+	 * @param date
+	 *            the new creation date
+	 */
 	public void setCreationDate(final DateTime date)
 	{
 		this.creationDate = date;
 	}
 
+	/**
+	 * Sets the digest.
+	 * 
+	 * @param digest
+	 *            the new digest
+	 */
 	public void setDigest(final String digest)
 	{
 		this.digest = digest;
 	}
 
+	/**
+	 * Sets the edition date.
+	 * 
+	 * @param date
+	 *            the new edition date
+	 */
 	public void setEditionDate(final DateTime date)
 	{
 		this.editionDate = date;
 	}
 
+	/**
+	 * Sets the id.
+	 * 
+	 * @param id
+	 *            the new id
+	 */
 	public void setId(final long id)
 	{
 		this.id = id;
 	}
 
+	/**
+	 * Sets the key.
+	 * 
+	 * @param key
+	 *            the new key
+	 */
 	public void setKey(final String key)
 	{
 		this.key = key;
 	}
 
+	/**
+	 * Sets the size.
+	 * 
+	 * @param size
+	 *            the new size
+	 */
 	public void setSize(final long size)
 	{
 		this.size = size;
 	}
 
+	/**
+	 * Sets the subkey.
+	 * 
+	 * @param subkey
+	 *            the new subkey
+	 */
 	public void setSubkey(final String subkey)
 	{
 		this.subkey = subkey;
 	}
 
+	/**
+	 * Sets the value.
+	 * 
+	 * @param value
+	 *            the new value
+	 */
 	public void setValue(final String value)
 	{
 		this.value = value;
 	}
 
 	/**
+	 * Update.
 	 * 
 	 * @param value
+	 *            the value
 	 */
 	public void update(final String value)
 	{
diff --git a/src/fr/devinsy/sikevadb/core/Elements.java b/src/fr/devinsy/sikevadb/core/Elements.java
index 9da7d68..b2f817d 100644
--- a/src/fr/devinsy/sikevadb/core/Elements.java
+++ b/src/fr/devinsy/sikevadb/core/Elements.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -21,16 +21,16 @@ package fr.devinsy.sikevadb.core;
 import java.util.ArrayList;
 
 /**
+ * The Class Elements.
  * 
- * 
- * @author Christian Pierre MOMON
+ * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class Elements extends ArrayList<Element>
 {
 	private static final long serialVersionUID = 6298920093179395791L;
 
 	/**
-	 * 
+	 * Instantiates a new elements.
 	 */
 	public Elements()
 	{
@@ -38,7 +38,10 @@ public class Elements extends ArrayList<Element>
 	}
 
 	/**
+	 * Instantiates a new elements.
 	 * 
+	 * @param initialCapacity
+	 *            the initial capacity
 	 */
 	public Elements(final int initialCapacity)
 	{
diff --git a/src/fr/devinsy/sikevadb/core/SikevaDB.java b/src/fr/devinsy/sikevadb/core/SikevaDB.java
index 1054258..9a7f29a 100644
--- a/src/fr/devinsy/sikevadb/core/SikevaDB.java
+++ b/src/fr/devinsy/sikevadb/core/SikevaDB.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -21,7 +21,7 @@ package fr.devinsy.sikevadb.core;
 import fr.devinsy.util.strings.StringList;
 
 /**
- * 
+ * The Interface SikevaDB.
  * 
  * @author Christian Pierre MOMON
  */
diff --git a/src/fr/devinsy/sikevadb/core/SikevaDBException.java b/src/fr/devinsy/sikevadb/core/SikevaDBException.java
index 71cb8b1..acfb64e 100644
--- a/src/fr/devinsy/sikevadb/core/SikevaDBException.java
+++ b/src/fr/devinsy/sikevadb/core/SikevaDBException.java
@@ -1,5 +1,5 @@
-/**
- * Copyright (C) 2013-2016 Christian Pierre MOMON <christian.momon@devinsy.fr>
+/*
+ * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
  * 
@@ -19,6 +19,7 @@
 package fr.devinsy.sikevadb.core;
 
 /**
+ * The Class SikevaDBException.
  * 
  * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
@@ -27,7 +28,7 @@ public class SikevaDBException extends Exception
 	private static final long serialVersionUID = 8323299610751708972L;
 
 	/**
-	 * 
+	 * Instantiates a new SikevaDB exception.
 	 */
 	public SikevaDBException()
 	{
@@ -35,8 +36,10 @@ public class SikevaDBException extends Exception
 	}
 
 	/**
+	 * Instantiates a new SikevaDB exception.
 	 * 
 	 * @param message
+	 *            the message
 	 */
 	public SikevaDBException(final String message)
 	{
@@ -44,9 +47,12 @@ public class SikevaDBException extends Exception
 	}
 
 	/**
+	 * Instantiates a new SikevaDB exception.
 	 * 
 	 * @param message
+	 *            the message
 	 * @param cause
+	 *            the cause
 	 */
 	public SikevaDBException(final String message, final Throwable cause)
 	{
@@ -54,8 +60,10 @@ public class SikevaDBException extends Exception
 	}
 
 	/**
+	 * Instantiates a new SikevaDB exception.
 	 * 
 	 * @param cause
+	 *            the cause
 	 */
 	public SikevaDBException(final Throwable cause)
 	{
diff --git a/src/fr/devinsy/sikevadb/core/SikevaDBFactory.java b/src/fr/devinsy/sikevadb/core/SikevaDBFactory.java
index 870c1d4..b085f0f 100644
--- a/src/fr/devinsy/sikevadb/core/SikevaDBFactory.java
+++ b/src/fr/devinsy/sikevadb/core/SikevaDBFactory.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -24,17 +24,22 @@ import fr.devinsy.sikevadb.filetree.FileTreeSikevaDB;
 import fr.devinsy.sikevadb.sql.SQLSikevaDB;
 
 /**
- * 
+ * A factory for creating SikevaDB objects.
  * 
  * @author Christian Pierre MOMON
  */
 public class SikevaDBFactory
 {
 	/**
+	 * Gets a SikevaDB instance from its database home directory.
 	 * 
 	 * @param path
-	 * @return
+	 *            the path of the database home directory
+	 * 
+	 * @return a SikevaDB instance
+	 * 
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public static SikevaDB get(final File path) throws SikevaDBException
 	{
@@ -47,9 +52,15 @@ public class SikevaDBFactory
 	}
 
 	/**
+	 * Gets a SikevaDB instance from a context.
 	 * 
 	 * @param contextName
-	 * @return
+	 *            the context name
+	 * 
+	 * @return a SikevaDB instance
+	 * 
+	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public static SikevaDB get(final String contextName)
 	{
@@ -62,12 +73,18 @@ public class SikevaDBFactory
 	}
 
 	/**
+	 * Gets a SikevaDB instance from dabase parameters.
 	 * 
 	 * @param driverClassName
+	 *            the driver class name
 	 * @param url
+	 *            the url
 	 * @param login
+	 *            the login
 	 * @param password
-	 * @return
+	 *            the password
+	 * 
+	 * @return the SikevaDB
 	 */
 	public static SikevaDB get(final String driverClassName, final String url, final String login, final String password)
 	{
diff --git a/src/fr/devinsy/sikevadb/core/SikevaDBUtils.java b/src/fr/devinsy/sikevadb/core/SikevaDBUtils.java
index 0093d4b..44f3e47 100644
--- a/src/fr/devinsy/sikevadb/core/SikevaDBUtils.java
+++ b/src/fr/devinsy/sikevadb/core/SikevaDBUtils.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -21,12 +21,17 @@ package fr.devinsy.sikevadb.core;
 import java.util.Date;
 
 /**
- * 
+ * The Class SikevaDBUtils.
  * 
  * @author Christian Pierre MOMON
  */
 public class SikevaDBUtils
 {
+	/**
+	 * Gets the current time in long format.
+	 * 
+	 * @return the long
+	 */
 	public static long now()
 	{
 		return new Date().getTime();
diff --git a/src/fr/devinsy/sikevadb/core/XMLSikevaDB.java b/src/fr/devinsy/sikevadb/core/XMLSikevaDB.java
index 7b64ddd..1c4b832 100644
--- a/src/fr/devinsy/sikevadb/core/XMLSikevaDB.java
+++ b/src/fr/devinsy/sikevadb/core/XMLSikevaDB.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -36,9 +36,9 @@ import fr.devinsy.util.xml.XMLWriter;
 import fr.devinsy.util.xml.XMLZipWriter;
 
 /**
- * This class represents a AccountManager File reader and writer.
+ * The Class XMLSikevaDB represents a XML persister.
  * 
- * @author TIP
+ * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
 public class XMLSikevaDB
 {
@@ -47,11 +47,13 @@ public class XMLSikevaDB
 	/**
 	 * Saves a net in a file.
 	 * 
-	 * @param file
-	 *            Target.
+	 * @param out
+	 *            the out
 	 * @param source
 	 *            Source.
 	 * 
+	 * @throws Exception
+	 *             the exception
 	 */
 	public static void export(final OutputStream out, final SikevaDB source) throws Exception
 	{
@@ -65,11 +67,15 @@ public class XMLSikevaDB
 	/**
 	 * Saves a net in a file.
 	 * 
-	 * @param file
-	 *            Target.
+	 * @param out
+	 *            the out
 	 * @param source
 	 *            Source.
+	 * @param fileName
+	 *            the file name
 	 * 
+	 * @throws Exception
+	 *             the exception
 	 */
 	public static void export(final OutputStream out, final SikevaDB source, final String fileName) throws Exception
 	{
@@ -110,9 +116,15 @@ public class XMLSikevaDB
 	}
 
 	/**
+	 * Import data.
 	 * 
+	 * @param database
+	 *            the database
 	 * @param file
-	 * @return
+	 *            the file
+	 * 
+	 * @throws Exception
+	 *             the exception
 	 */
 	public static void importData(final SikevaDB database, final File file) throws Exception
 	{
@@ -128,12 +140,16 @@ public class XMLSikevaDB
 	}
 
 	/**
+	 * Read element.
 	 * 
-	 * @param target
 	 * @param in
-	 * @throws XMLBadFormatException
+	 *            the in
+	 * @return the element
+	 * 
 	 * @throws XMLStreamException
-	 * @throws Exception
+	 *             the XML stream exception
+	 * @throws XMLBadFormatException
+	 *             the XML bad format exception
 	 */
 	public static Element readElement(final XMLReader in) throws XMLStreamException, XMLBadFormatException
 	{
@@ -187,10 +203,15 @@ public class XMLSikevaDB
 	}
 
 	/**
+	 * Read elements.
 	 * 
 	 * @param target
+	 *            the target
 	 * @param in
+	 *            the in
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	public static void readElements(final SikevaDB target, final XMLReader in) throws Exception
 	{
@@ -216,9 +237,12 @@ public class XMLSikevaDB
 	}
 
 	/**
+	 * Write.
 	 * 
+	 * @param out
+	 *            the out
 	 * @param source
-	 * @return
+	 *            the source
 	 */
 	public static void write(final XMLWriter out, final Element source)
 	{
@@ -269,10 +293,15 @@ public class XMLSikevaDB
 	}
 
 	/**
+	 * Write.
 	 * 
 	 * @param out
+	 *            the out
 	 * @param source
+	 *            the source
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	public static void write(final XMLWriter out, final SikevaDB source) throws Exception
 	{
diff --git a/src/fr/devinsy/sikevadb/demo/SikevaDBDemo.java b/src/fr/devinsy/sikevadb/demo/SikevaDBDemo.java
index 1162a09..4b63da1 100644
--- a/src/fr/devinsy/sikevadb/demo/SikevaDBDemo.java
+++ b/src/fr/devinsy/sikevadb/demo/SikevaDBDemo.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -34,24 +34,24 @@ import fr.devinsy.sikevadb.core.SikevaDBFactory;
 import fr.devinsy.util.strings.StringList;
 
 /**
- * This class manage a Command Line Interface for SikevaDB.
- * 
- * 
+ * The Class SikevaDBDemo is a demo for SikevaDB.
  */
 public final class SikevaDBDemo
 {
 	private static Logger logger = LoggerFactory.getLogger(SikevaDBDemo.class);
 
 	/**
-     *
-     */
+	 * SikevaDBDemo class has to be not instanciated.
+	 */
 	private SikevaDBDemo()
 	{
 	}
 
 	/**
-	 * @throws SikevaDBException
+	 * Demo.
 	 * 
+	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public static void demo() throws SikevaDBException
 	{
@@ -160,8 +160,10 @@ public final class SikevaDBDemo
 	}
 
 	/**
+	 * The main method.
 	 * 
 	 * @param args
+	 *            the arguments
 	 */
 	public static void main(final String[] args)
 	{
diff --git a/src/fr/devinsy/sikevadb/demo/SikevaDBDemoException.java b/src/fr/devinsy/sikevadb/demo/SikevaDBDemoException.java
index 49afc4e..0c9a2b7 100644
--- a/src/fr/devinsy/sikevadb/demo/SikevaDBDemoException.java
+++ b/src/fr/devinsy/sikevadb/demo/SikevaDBDemoException.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -21,14 +21,14 @@ package fr.devinsy.sikevadb.demo;
 import fr.devinsy.sikevadb.core.SikevaDBException;
 
 /**
- * 
+ * The Class SikevaDBDemoException.
  */
 public class SikevaDBDemoException extends SikevaDBException
 {
 	private static final long serialVersionUID = 1162267847144476595L;
 
 	/**
-	 *
+	 * Instantiates a new SikevaDB demo exception.
 	 */
 	public SikevaDBDemoException()
 	{
@@ -36,8 +36,10 @@ public class SikevaDBDemoException extends SikevaDBException
 	}
 
 	/**
+	 * Instantiates a new SikevaDB demo exception.
 	 * 
 	 * @param message
+	 *            the message
 	 */
 	public SikevaDBDemoException(final String message)
 	{
@@ -45,9 +47,12 @@ public class SikevaDBDemoException extends SikevaDBException
 	}
 
 	/**
+	 * Instantiates a new SikevaDB demo exception.
 	 * 
 	 * @param message
+	 *            the message
 	 * @param cause
+	 *            the cause
 	 */
 	public SikevaDBDemoException(final String message, final Throwable cause)
 	{
@@ -55,8 +60,10 @@ public class SikevaDBDemoException extends SikevaDBException
 	}
 
 	/**
+	 * Instantiates a new SikevaDB demo exception.
 	 * 
 	 * @param cause
+	 *            the cause
 	 */
 	public SikevaDBDemoException(final Throwable cause)
 	{
diff --git a/src/fr/devinsy/sikevadb/filetree/FileTreeArchiver.java b/src/fr/devinsy/sikevadb/filetree/FileTreeArchiver.java
index 529b618..8d63eff 100644
--- a/src/fr/devinsy/sikevadb/filetree/FileTreeArchiver.java
+++ b/src/fr/devinsy/sikevadb/filetree/FileTreeArchiver.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -26,10 +26,11 @@ import fr.devinsy.sikevadb.core.SikevaDB;
 import fr.devinsy.sikevadb.core.SikevaDBException;
 
 /**
- * 
+ * The Class FileTreeArchiver.
  * 
  * @author Christian Pierre MOMON
  */
+
 public class FileTreeArchiver implements Archiver
 {
 	private static final String ARCHIVE_PATH = "archive";
@@ -39,9 +40,13 @@ public class FileTreeArchiver implements Archiver
 	private SikevaDB database;
 
 	/**
+	 * Instantiates a new file tree archiver.
 	 * 
 	 * @param source
+	 *            the source
+	 * 
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public FileTreeArchiver(final FileTreeSikevaDB source) throws SikevaDBException
 	{
@@ -68,8 +73,8 @@ public class FileTreeArchiver implements Archiver
 		}
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#activate()
 	 */
 	@Override
 	public void activate()
@@ -77,28 +82,26 @@ public class FileTreeArchiver implements Archiver
 		this.status = Status.ACTIVATED;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#archive(fr.devinsy.sikevadb.core.Element)
 	 */
 	@Override
 	public void archive(final Element element) throws SikevaDBException
 	{
 		// TODO Auto-generated method stub
-
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#clear()
 	 */
 	@Override
 	public void clear() throws SikevaDBException
 	{
 		// TODO Auto-generated method stub
-
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#close()
 	 */
 	@Override
 	public void close()
@@ -107,16 +110,17 @@ public class FileTreeArchiver implements Archiver
 	}
 
 	/**
+	 * Gets the path.
 	 * 
-	 * @return
+	 * @return the path
 	 */
 	public File getPath()
 	{
 		return this.archiveDirectory;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#isActivated()
 	 */
 	@Override
 	public boolean isActivated()
@@ -136,8 +140,8 @@ public class FileTreeArchiver implements Archiver
 		return result;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#isSuspended()
 	 */
 	@Override
 	public boolean isSuspended()
@@ -150,8 +154,8 @@ public class FileTreeArchiver implements Archiver
 		return result;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#suspend()
 	 */
 	@Override
 	public void suspend()
diff --git a/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDB.java b/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDB.java
index e04ff8b..085f58a 100644
--- a/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDB.java
+++ b/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDB.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -38,6 +38,8 @@ import fr.devinsy.util.ToolBox;
 import fr.devinsy.util.strings.StringList;
 
 /**
+ * The Class FileTreeSikevaDB.
+ * 
  * <pre>
  * private long id;					IN
  * private DateTime creationDate;	IN
@@ -72,9 +74,16 @@ public class FileTreeSikevaDB implements SikevaDB
 	private File configDirectory;
 
 	/**
+	 * Instantiates a new file tree SikevaDB.
 	 * 
-	 * @param contextName
+	 * @param homeDirectory
+	 *            the home directory
+	 * @param login
+	 *            the login
+	 * @param password
+	 *            the password
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public FileTreeSikevaDB(final File homeDirectory, final String login, final String password) throws SikevaDBException
 	{
@@ -98,9 +107,11 @@ public class FileTreeSikevaDB implements SikevaDB
 		}
 	}
 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.SikevaDB#archiver()
+	 */
 	/**
 	 * {@inheritDoc}
-	 * 
 	 */
 	@Override
 	public Archiver archiver() throws SikevaDBException
@@ -108,9 +119,8 @@ public class FileTreeSikevaDB implements SikevaDB
 		return this.archiver;
 	}
 
-	/**
-	 * @throws IOException
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.SikevaDB#clear()
 	 */
 	@Override
 	public void clear() throws SikevaDBException
@@ -380,8 +390,9 @@ public class FileTreeSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the config directory.
 	 * 
-	 * @return
+	 * @return the config directory
 	 */
 	public File getConfigDirectory()
 	{
@@ -389,8 +400,9 @@ public class FileTreeSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the data directory.
 	 * 
-	 * @return
+	 * @return the data directory
 	 */
 	public File getDataDirectory()
 	{
@@ -573,8 +585,9 @@ public class FileTreeSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the file tree directory.
 	 * 
-	 * @return
+	 * @return the file tree directory
 	 */
 	public File getFileTreeDirectory()
 	{
@@ -626,8 +639,9 @@ public class FileTreeSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the login.
 	 * 
-	 * @return
+	 * @return the login
 	 */
 	public String getLogin()
 	{
@@ -635,8 +649,9 @@ public class FileTreeSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the password.
 	 * 
-	 * @return
+	 * @return the password
 	 */
 	public String getPassword()
 	{
@@ -829,8 +844,8 @@ public class FileTreeSikevaDB implements SikevaDB
 		return result;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.SikevaDB#isArchiveActivated()
 	 */
 	@Override
 	public boolean isArchiveActivated()
@@ -850,8 +865,8 @@ public class FileTreeSikevaDB implements SikevaDB
 		return result;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.SikevaDB#isArchiveSuspended()
 	 */
 	@Override
 	public boolean isArchiveSuspended()
@@ -864,9 +879,8 @@ public class FileTreeSikevaDB implements SikevaDB
 		return result;
 	}
 
-	/**
-	 * 
-	 * @return
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.SikevaDB#isClosed()
 	 */
 	@Override
 	public boolean isClosed()
@@ -900,9 +914,8 @@ public class FileTreeSikevaDB implements SikevaDB
 		return result;
 	}
 
-	/**
-	 * 
-	 * @return
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.SikevaDB#isOpened()
 	 */
 	@Override
 	public boolean isOpened()
@@ -1554,8 +1567,10 @@ public class FileTreeSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Sets the login.
 	 * 
 	 * @param login
+	 *            the new login
 	 */
 	public void setLogin(final String login)
 	{
@@ -1563,8 +1578,10 @@ public class FileTreeSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Sets the password.
 	 * 
 	 * @param password
+	 *            the new password
 	 */
 	public void setPassword(final String password)
 	{
diff --git a/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDBTools.java b/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDBTools.java
index 3400547..fd3ceea 100644
--- a/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDBTools.java
+++ b/src/fr/devinsy/sikevadb/filetree/FileTreeSikevaDBTools.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -36,21 +36,23 @@ import fr.devinsy.util.xml.XMLReader;
 import fr.devinsy.util.xml.XMLWriter;
 
 /**
- * 
+ * The Class FileTreeSikevaDBTools.
  * 
  * @author Christian Pierre MOMON
  */
+
 public class FileTreeSikevaDBTools
 {
 	private static final Logger LOGGER = LoggerFactory.getLogger(FileTreeSikevaDBTools.class);
 
 	/**
+	 * Load element.
 	 * 
 	 * @param source
-	 * @return
-	 * @throws FileNotFoundException
-	 * @throws XMLStreamException
-	 * @throws XMLBadFormatException
+	 *            the source
+	 * @return the element
+	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public static Element loadElement(final File source) throws SikevaDBException
 	{
@@ -137,10 +139,14 @@ public class FileTreeSikevaDBTools
 	}
 
 	/**
+	 * Save element.
 	 * 
 	 * @param target
+	 *            the target
 	 * @param source
+	 *            the source
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public static void saveElement(final File target, final Element source) throws SikevaDBException
 	{
diff --git a/src/fr/devinsy/sikevadb/sql/SQLArchiver.java b/src/fr/devinsy/sikevadb/sql/SQLArchiver.java
index 3e2765f..4af4da6 100644
--- a/src/fr/devinsy/sikevadb/sql/SQLArchiver.java
+++ b/src/fr/devinsy/sikevadb/sql/SQLArchiver.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -26,10 +26,11 @@ import fr.devinsy.sikevadb.core.Element;
 import fr.devinsy.sikevadb.core.SikevaDBException;
 
 /**
- * 
+ * The Class SQLArchiver.
  * 
  * @author Christian Pierre MOMON
  */
+
 public class SQLArchiver implements Archiver
 {
 	private static final Logger logger = LoggerFactory.getLogger(SQLArchiver.class);;
@@ -38,8 +39,10 @@ public class SQLArchiver implements Archiver
 	private SQLSikevaDB database;
 
 	/**
+	 * Instantiates a new SQL archiver.
 	 * 
-	 * @param contextName
+	 * @param source
+	 *            the source
 	 */
 	public SQLArchiver(final SQLSikevaDB source)
 	{
@@ -54,8 +57,8 @@ public class SQLArchiver implements Archiver
 		}
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#activate()
 	 */
 	@Override
 	public void activate()
@@ -63,8 +66,8 @@ public class SQLArchiver implements Archiver
 		this.status = Status.ACTIVATED;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#archive(fr.devinsy.sikevadb.core.Element)
 	 */
 	@Override
 	public void archive(final Element element) throws SikevaDBException
@@ -72,8 +75,8 @@ public class SQLArchiver implements Archiver
 		// TODO
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#clear()
 	 */
 	@Override
 	public void clear() throws SikevaDBException
@@ -81,8 +84,8 @@ public class SQLArchiver implements Archiver
 		// TODO
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#close()
 	 */
 	@Override
 	public void close()
@@ -90,8 +93,8 @@ public class SQLArchiver implements Archiver
 		// TODO
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#isActivated()
 	 */
 	@Override
 	public boolean isActivated()
@@ -111,8 +114,8 @@ public class SQLArchiver implements Archiver
 		return result;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#isSuspended()
 	 */
 	@Override
 	public boolean isSuspended()
@@ -125,8 +128,8 @@ public class SQLArchiver implements Archiver
 		return result;
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.Archiver#suspend()
 	 */
 	@Override
 	public void suspend()
diff --git a/src/fr/devinsy/sikevadb/sql/SQLSikevaDB.java b/src/fr/devinsy/sikevadb/sql/SQLSikevaDB.java
index a2676e2..a1727a2 100644
--- a/src/fr/devinsy/sikevadb/sql/SQLSikevaDB.java
+++ b/src/fr/devinsy/sikevadb/sql/SQLSikevaDB.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -44,10 +44,11 @@ import fr.devinsy.sikevadb.core.SikevaDBException;
 import fr.devinsy.util.strings.StringList;
 
 /**
- * 
+ * The Class SQLSikevaDB.
  * 
  * @author Christian Pierre MOMON
  */
+
 public class SQLSikevaDB implements SikevaDB
 {
 	public enum Status
@@ -69,8 +70,10 @@ public class SQLSikevaDB implements SikevaDB
 	private Archiver archiver;
 
 	/**
+	 * Instantiates a new SQL SikevaDB.
 	 * 
 	 * @param contextName
+	 *            the context name
 	 */
 	public SQLSikevaDB(final String contextName)
 	{
@@ -82,10 +85,14 @@ public class SQLSikevaDB implements SikevaDB
 	/**
 	 * This method opens a database session.
 	 * 
-	 * @param host
-	 * @param port
+	 * @param driverClassName
+	 *            the driver class name
+	 * @param url
+	 *            the url
 	 * @param login
+	 *            the login
 	 * @param password
+	 *            the password
 	 */
 	public SQLSikevaDB(final String driverClassName, final String url, final String login, final String password)
 	{
@@ -118,15 +125,15 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
-	 * 
+	 * Activate archiver.
 	 */
 	public void activateArchiver()
 	{
 		this.archiver.activate();
 	}
 
-	/**
-	 * 
+	/* (non-Javadoc)
+	 * @see fr.devinsy.sikevadb.core.SikevaDB#archiver()
 	 */
 	@Override
 	public Archiver archiver() throws SikevaDBException
@@ -204,10 +211,14 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Close quietly.
 	 * 
 	 * @param connection
+	 *            the connection
 	 * @param statement
+	 *            the statement
 	 * @param resultSet
+	 *            the result set
 	 */
 	private void closeQuietly(final Connection connection, final Statement statement, final ResultSet resultSet)
 	{
@@ -500,10 +511,13 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Exists.
 	 * 
-	 * @param id
-	 * @return
+	 * @param element
+	 *            the element
+	 * @return true, if successful
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public boolean exists(final Element element) throws SikevaDBException
 	{
@@ -527,9 +541,11 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the connection.
 	 * 
-	 * @return
+	 * @return the connection
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public Connection getConnection() throws SikevaDBException
 	{
@@ -561,8 +577,9 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the context name.
 	 * 
-	 * @return
+	 * @return the context name
 	 */
 	public String getContextName()
 	{
@@ -570,8 +587,9 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the driver classname.
 	 * 
-	 * @return
+	 * @return the driver classname
 	 */
 	public String getDriverClassname()
 	{
@@ -579,10 +597,13 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the element.
 	 * 
 	 * @param id
-	 * @return
+	 *            the id
+	 * @return the element
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	public Element getElement(final long id) throws SikevaDBException
 	{
@@ -1019,8 +1040,9 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the login.
 	 * 
-	 * @return
+	 * @return the login
 	 */
 	public String getLogin()
 	{
@@ -1028,8 +1050,9 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the password.
 	 * 
-	 * @return
+	 * @return the password
 	 */
 	public String getPassword()
 	{
@@ -1095,8 +1118,9 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Gets the url.
 	 * 
-	 * @return
+	 * @return the url
 	 */
 	public String getUrl()
 	{
@@ -2303,8 +2327,10 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Sets the driver classname.
 	 * 
 	 * @param driverClassname
+	 *            the new driver classname
 	 */
 	public void setDriverClassname(final String driverClassname)
 	{
@@ -2312,8 +2338,10 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Sets the login.
 	 * 
 	 * @param login
+	 *            the new login
 	 */
 	public void setLogin(final String login)
 	{
@@ -2321,8 +2349,10 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Sets the password.
 	 * 
 	 * @param password
+	 *            the new password
 	 */
 	public void setPassword(final String password)
 	{
@@ -2330,8 +2360,10 @@ public class SQLSikevaDB implements SikevaDB
 	}
 
 	/**
+	 * Sets the url.
 	 * 
 	 * @param url
+	 *            the new url
 	 */
 	public void setUrl(final String url)
 	{
diff --git a/src/fr/devinsy/sikevadb/sql/SQLSikevaDBTools.java b/src/fr/devinsy/sikevadb/sql/SQLSikevaDBTools.java
index a4b0d5f..25a96ac 100644
--- a/src/fr/devinsy/sikevadb/sql/SQLSikevaDBTools.java
+++ b/src/fr/devinsy/sikevadb/sql/SQLSikevaDBTools.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -33,7 +33,7 @@ import fr.devinsy.util.FileTools;
 import fr.devinsy.util.strings.StringList;
 
 /**
- * 
+ * The Class SQLSikevaDBTools.
  * 
  * @author Christian Pierre MOMON
  */
@@ -42,9 +42,13 @@ public class SQLSikevaDBTools
 	private static final Logger logger = LoggerFactory.getLogger(SQLSikevaDBTools.class);
 
 	/**
+	 * Load SQL script.
 	 * 
 	 * @param source
+	 *            the source
+	 * @return the string list
 	 * @throws IOException
+	 *             Signals that an I/O exception has occurred.
 	 */
 	public static StringList loadSQLScript(final URL source) throws IOException
 	{
@@ -59,9 +63,13 @@ public class SQLSikevaDBTools
 	}
 
 	/**
+	 * Split SQL commands.
 	 * 
 	 * @param source
+	 *            the source
+	 * @return the string list
 	 * @throws IOException
+	 *             Signals that an I/O exception has occurred.
 	 */
 	public static StringList splitSQLCommands(final String source) throws IOException
 	{
@@ -121,9 +129,11 @@ public class SQLSikevaDBTools
 	}
 
 	/**
+	 * To date time.
 	 * 
 	 * @param source
-	 * @return
+	 *            the source
+	 * @return the date time
 	 */
 	public static DateTime toDateTime(final java.sql.Timestamp source)
 	{
@@ -143,9 +153,11 @@ public class SQLSikevaDBTools
 	}
 
 	/**
+	 * To timestamp.
 	 * 
 	 * @param source
-	 * @return
+	 *            the source
+	 * @return the java.sql. timestamp
 	 */
 	public static java.sql.Timestamp toTimestamp(final Date source)
 	{
@@ -165,9 +177,11 @@ public class SQLSikevaDBTools
 	}
 
 	/**
+	 * To timestamp.
 	 * 
 	 * @param source
-	 * @return
+	 *            the source
+	 * @return the java.sql. timestamp
 	 */
 	public static java.sql.Timestamp toTimestamp(final DateTime source)
 	{
diff --git a/src/utils/BuildInformation.java b/src/utils/BuildInformation.java
index e186d3b..cf00478 100644
--- a/src/utils/BuildInformation.java
+++ b/src/utils/BuildInformation.java
@@ -1,5 +1,5 @@
-/**
- * Copyright (C) 2013-2016 Christian Pierre MOMON <christian.momon@devinsy.fr>
+/*
+ * Copyright (C) 2013-2017 Christian Pierre MOMON <christian.momon@devinsy.fr>
  * 
  * This file is part of SikevaDB, simple key value database.
  * 
@@ -27,9 +27,11 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
+ * The Class BuildInformation.
  * 
  * @author Christian Pierre MOMON (christian.momon@devinsy.fr)
  */
+
 public class BuildInformation
 {
 	private static class SingletonHolder
@@ -50,8 +52,8 @@ public class BuildInformation
 	private String buildAuthor;
 
 	/**
-     *
-     */
+	 * Instantiates a new builds the information.
+	 */
 	private BuildInformation()
 	{
 		Properties build = new Properties();
@@ -92,47 +94,78 @@ public class BuildInformation
 	}
 
 	/**
+	 * Builds the author.
 	 * 
-	 * @return
+	 * @return the string
 	 */
 	public String buildAuthor()
 	{
 		return this.buildAuthor;
 	}
 
+	/**
+	 * Builds the date.
+	 * 
+	 * @return the string
+	 */
 	public String buildDate()
 	{
 		return this.buildDate;
 	}
 
+	/**
+	 * Builds the number.
+	 * 
+	 * @return the string
+	 */
 	public String buildNumber()
 	{
 		return this.buildNumber;
 	}
 
+	/**
+	 * Generator.
+	 * 
+	 * @return the string
+	 */
 	public String generator()
 	{
 		return this.generator;
 	}
 
+	/**
+	 * Major revision.
+	 * 
+	 * @return the string
+	 */
 	public String majorRevision()
 	{
 		return this.majorRevision;
 	}
 
+	/**
+	 * Minor revision.
+	 * 
+	 * @return the string
+	 */
 	public String minorRevision()
 	{
 		return this.minorRevision;
 	}
 
+	/**
+	 * Product name.
+	 * 
+	 * @return the string
+	 */
 	public String productName()
 	{
 		return this.productName;
 	}
 
-	/**
-     *
-     */
+	/* (non-Javadoc)
+	 * @see java.lang.Object#toString()
+	 */
 	@Override
 	public String toString()
 	{
@@ -145,8 +178,9 @@ public class BuildInformation
 	}
 
 	/**
+	 * Version.
 	 * 
-	 * @return
+	 * @return the string
 	 */
 	public String version()
 	{
@@ -159,8 +193,9 @@ public class BuildInformation
 	}
 
 	/**
+	 * Instance.
 	 * 
-	 * @return
+	 * @return the builds the information
 	 */
 	public static BuildInformation instance()
 	{
@@ -168,8 +203,10 @@ public class BuildInformation
 	}
 
 	/**
-     *
-     */
+	 * Checks if is defined.
+	 * 
+	 * @return true, if is defined
+	 */
 	public static boolean isDefined()
 	{
 		boolean result;
diff --git a/test/fr/devinsy/sikevadb/filetree/TreeFileSikevaDBTest.java b/test/fr/devinsy/sikevadb/filetree/TreeFileSikevaDBTest.java
index 0a62dd8..209e4dc 100644
--- a/test/fr/devinsy/sikevadb/filetree/TreeFileSikevaDBTest.java
+++ b/test/fr/devinsy/sikevadb/filetree/TreeFileSikevaDBTest.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON, DEVINSY
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -37,6 +37,7 @@ import fr.devinsy.sikevadb.core.SikevaDBException;
 import fr.devinsy.util.strings.StringList;
 
 /**
+ * The Class TreeFileSikevaDBTest.
  * 
  * @author Christian Pierre MOMON
  */
@@ -46,7 +47,10 @@ public class TreeFileSikevaDBTest
 	private static FileTreeSikevaDB database;
 
 	/**
+	 * Test get keyse 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testGetKeyse01() throws Exception
@@ -76,7 +80,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test get keyse 02.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testGetKeyse02() throws Exception
@@ -111,7 +118,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test memory size 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testMemorySize01() throws Exception
@@ -150,7 +160,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPut01() throws Exception
@@ -170,7 +183,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put 02.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPut02() throws Exception
@@ -191,7 +207,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put 03.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test(expected = IllegalArgumentException.class)
 	public void testPut03() throws Exception
@@ -208,7 +227,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put 04.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPut04() throws Exception
@@ -229,7 +251,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put 05.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPut05() throws Exception
@@ -260,7 +285,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put 06.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPut06() throws Exception
@@ -292,7 +320,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put element 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPutElement01() throws Exception
@@ -324,7 +355,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put element 02.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPutElement02() throws Exception
@@ -358,7 +392,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test put element 03.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testPutElement03() throws Exception
@@ -415,7 +452,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test random 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testRandom01() throws Exception
@@ -440,7 +480,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test remove 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testRemove01() throws Exception
@@ -472,7 +515,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test remove many 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testRemoveMany01() throws Exception
@@ -507,7 +553,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test rename key 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testRenameKey01() throws Exception
@@ -537,7 +586,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test size 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testSize01() throws Exception
@@ -585,7 +637,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Test tittle 01.
+	 * 
 	 * @throws Exception
+	 *             the exception
 	 */
 	@Test
 	public void testTittle01() throws Exception
@@ -605,8 +660,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
-	 * @throws SikevaDBException
+	 * After class.
 	 * 
+	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	@AfterClass
 	public static void afterClass() throws SikevaDBException
@@ -618,7 +675,10 @@ public class TreeFileSikevaDBTest
 	}
 
 	/**
+	 * Before class.
+	 * 
 	 * @throws SikevaDBException
+	 *             the SikevaDB exception
 	 */
 	@BeforeClass
 	public static void beforeClass() throws SikevaDBException
diff --git a/test/fr/devinsy/sikevadb/sql/SQLSikevaDBTest.java b/test/fr/devinsy/sikevadb/sql/SQLSikevaDBTest.java
index bd4132e..6192a71 100644
--- a/test/fr/devinsy/sikevadb/sql/SQLSikevaDBTest.java
+++ b/test/fr/devinsy/sikevadb/sql/SQLSikevaDBTest.java
@@ -1,4 +1,4 @@
-/**
+/*
  * Copyright (C) 2013-2017 Christian Pierre MOMON, DEVINSY
  * 
  * This file is part of SikevaDB, simple key value database.
@@ -35,6 +35,7 @@ import fr.devinsy.sikevadb.core.SikevaDBException;
 import fr.devinsy.util.strings.StringList;
 
 /**
+ * The Class SQLSikevaDBTest.
  * 
  * @author Christian Pierre MOMON
  */