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diff --git a/sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java b/sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java
new file mode 100644
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--- /dev/null
+++ b/sca-java-2.x/tags/2.0.1-RC1/modules/extensibility/src/main/java/org/apache/tuscany/sca/core/ModuleActivator.java
@@ -0,0 +1,72 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ * 
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ * 
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.    
+ */
+
+package org.apache.tuscany.sca.core;
+
+
+/**
+ * ModuleActivator represents a module that plugs into the Tuscany system. Each 
+ * module should provide an implementation of this interface and register the 
+ * ModuleActivator implementation class by defining a file named 
+ * 
+ * "META-INF/services/org.apache.tuscany.core.ModuleActivator"
+ * 
+ * The content of the file is the class name of the ModuleActivator implementation. 
+ * The implementation class can have different flavors of constructors. The following
+ * order will be searched:
+ * <ul>
+ * <li>(ExtensionRegistry.class) 
+ * <li>(ExtensionRegistry.class, Map.class)
+ * <li>()
+ * </ul>
+ *  
+ * 
+ * 
+ * 
+ * The same instance 
+ * will be used to invoke all the methods during different phases of the module 
+ * activation. Note that the start and stop methods defined by this interface
+ * take a reference to the Tuscany SCA runtime ExtensionPointRegistry. This 
+ * gives the ModuleActivator the opportunity to add extension points to the
+ * registry as it is requested to start up and remove them when it is requested
+ * to shut down.
+ * 
+ * @version $Rev$ $Date$
+ * @tuscany.spi.extension.inheritfrom
+ */
+public interface ModuleActivator extends LifeCycleListener {
+
+    /**
+     * This method is invoked when the module is started by the Tuscany runtime.
+     * It can be used by this module to register extensions against extension
+     * points.
+     * 
+     * @param registry The extension point registry
+     */
+    void start();
+
+    /**
+     * This method is invoked when the module is stopped by the Tuscany runtime.
+     * It can be used by this module to unregister extensions against the
+     * extension points.
+     * 
+     * @param registry The extension point registry
+     */
+    void stop();
+}