diff -r a151135b0cf9 -r aa2539c91954 tracesrv/tracecompiler/src/com.nokia.tracecompiler/src/com/nokia/tracecompiler/engine/TraceCompilerEngineBase.java
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tracesrv/tracecompiler/src/com.nokia.tracecompiler/src/com/nokia/tracecompiler/engine/TraceCompilerEngineBase.java	Fri Oct 08 14:56:39 2010 +0300
@@ -0,0 +1,48 @@
+/*
+* Copyright (c) 2007 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:
+*
+* Base class for all engine classes
+*
+*/
+package com.nokia.tracecompiler.engine;
+
+import com.nokia.tracecompiler.model.TraceCompilerException;
+
+/**
+ * Base class for all engine classes
+ * 
+ */
+public abstract class TraceCompilerEngineBase {
+
+	/**
+	 * Called after trace project has been opened
+	 * @throws TraceCompilerException 
+	 */
+	public abstract void projectOpened() throws TraceCompilerException;
+
+	/**
+	 * Called when trace project is closed
+	 */
+	public abstract void projectClosed();
+
+	/**
+	 * Called when exporting the project
+	 * 
+	 * @throws TraceCompilerException
+	 *             if export fails
+	 */
+	public abstract void exportProject() throws TraceCompilerException;
+
+}