diff -r ed1c9f64298a -r 5b9d4d8641ce trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/action/TraceCommentValidator.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/trace/traceviewer/com.nokia.traceviewer/src/com/nokia/traceviewer/action/TraceCommentValidator.java	Wed Jun 23 14:49:59 2010 +0300
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2007-2010 Nokia Corporation and/or its subsidiary(-ies). 
+ * All rights reserved.
+ * This component and the accompanying materials are made available
+ * under the terms of "Eclipse Public License v1.0"
+ * which accompanies this distribution, and is available
+ * at the URL "http://www.eclipse.org/legal/epl-v10.html".
+ *
+ * Initial Contributors:
+ * Nokia Corporation - initial contribution.
+ *
+ * Contributors:
+ *
+ * Description:
+ *
+ * Trace comment validator
+ *
+ */
+package com.nokia.traceviewer.action;
+
+import org.eclipse.jface.dialogs.IInputValidator;
+
+/**
+ * Trace comment validator
+ */
+public class TraceCommentValidator implements IInputValidator {
+
+	/*
+	 * (non-Javadoc)
+	 * 
+	 * @see org.eclipse.jface.dialogs.IInputValidator#isValid(java.lang.String)
+	 */
+	public String isValid(String str) {
+		String ret = null;
+		if (str == null || str.equals("")) { //$NON-NLS-1$
+			ret = ""; //$NON-NLS-1$
+		}
+		return ret;
+	}
+
+}