diff --git a/org.adempiere.ui/src/org/compiere/apps/IStatusBar.java b/org.adempiere.ui/src/org/compiere/apps/IStatusBar.java
index 8fa831fc57..0f310464d8 100644
--- a/org.adempiere.ui/src/org/compiere/apps/IStatusBar.java
+++ b/org.adempiere.ui/src/org/compiere/apps/IStatusBar.java
@@ -1,16 +1,67 @@
+/***********************************************************************
+ * This file is part of iDempiere ERP Open Source                      *
+ * http://www.idempiere.org                                            *
+ *                                                                     *
+ * Copyright (C) Contributors                                          *
+ *                                                                     *
+ * This program is free software; you can redistribute it and/or       *
+ * modify it under the terms of the GNU General Public License         *
+ * as published by the Free Software Foundation; either version 2      *
+ * of the License, or (at your option) any later version.              *
+ *                                                                     *
+ * This program is distributed in the hope that it will be useful,     *
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of      *
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the        *
+ * GNU General Public License for more details.                        *
+ *                                                                     *
+ * You should have received a copy of the GNU General Public License   *
+ * along with this program; if not, write to the Free Software         *
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,          *
+ * MA 02110-1301, USA.                                                 *
+ *                                                                     *
+ * Contributors:                                                       *
+ * - hengsin                         								   *
+ **********************************************************************/
 package org.compiere.apps;
 
 import org.compiere.model.DataStatusEvent;
 
+/**
+ * Status bar with three zone (from left to right): line, info and db.
+ * @author hengsin
+ *
+ */
 public interface IStatusBar 
 {
+	/**
+	 * set text for db zone
+	 * @param text
+	 */
 	public void setStatusDB (String text);
 	
+	/**
+	 * set text for db zone
+	 * @param text
+	 * @param dse
+	 */
 	public void setStatusDB (String text, DataStatusEvent dse);
 	
+	/**
+	 * set text for text zone
+	 * @param text
+	 */
 	public void setStatusLine (String text);
 	
+	/**
+	 * set text for text zone
+	 * @param text
+	 * @param error
+	 */
 	public void setStatusLine (String text, boolean error);
 	
+	/**
+	 * set text for info zone
+	 * @param text
+	 */
 	public void setInfo (String text);
 }