diff --git a/base/src/org/compiere/model/StateChangeEvent.java b/base/src/org/compiere/model/StateChangeEvent.java
index c9b07e82c1..1480c2dda5 100644
--- a/base/src/org/compiere/model/StateChangeEvent.java
+++ b/base/src/org/compiere/model/StateChangeEvent.java
@@ -1,3 +1,16 @@
+/******************************************************************************
+ * Product: Adempiere ERP & CRM Smart Business Solution                       *
+ * Copyright (C) 2007 Adempiere, Inc. All Rights Reserved.                    *
+ * This program is free software; you can redistribute it and/or modify it    *
+ * under the terms version 2 of the GNU General Public License as published   *
+ * by the Free Software Foundation. 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.,    *
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.                     *
+ *****************************************************************************/
 package org.compiere.model;
 
 import java.util.EventObject;
@@ -11,6 +24,11 @@ public class StateChangeEvent extends EventObject {
 
 	private int eventType;
 
+	/**
+	 * 
+	 * @param source
+	 * @param eventType
+	 */
 	public StateChangeEvent(Object source, int eventType) {
 		super(source);
 		this.eventType = eventType;
diff --git a/base/src/org/compiere/model/StateChangeListener.java b/base/src/org/compiere/model/StateChangeListener.java
index 241774a1e6..0e8ec84f14 100644
--- a/base/src/org/compiere/model/StateChangeListener.java
+++ b/base/src/org/compiere/model/StateChangeListener.java
@@ -1,3 +1,16 @@
+/******************************************************************************
+ * Product: Adempiere ERP & CRM Smart Business Solution                       *
+ * Copyright (C) 2007 Adempiere, Inc. All Rights Reserved.                    *
+ * This program is free software; you can redistribute it and/or modify it    *
+ * under the terms version 2 of the GNU General Public License as published   *
+ * by the Free Software Foundation. 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.,    *
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.                     *
+ *****************************************************************************/
 package org.compiere.model;
 
 import java.util.EventListener;
@@ -9,6 +22,10 @@ import java.util.EventListener;
  */
 public interface StateChangeListener extends EventListener {
 
+	/**
+	 * 
+	 * @param event
+	 */
 	public void stateChange(StateChangeEvent event);
 	
 }