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diff --git a/opendaylight/commons/protocol-framework/src/main/java/org/opendaylight/protocol/framework/ProtocolSession.java b/opendaylight/commons/protocol-framework/src/main/java/org/opendaylight/protocol/framework/ProtocolSession.java
new file mode 100644
index 0000000000..6e79d6765d
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+++ b/opendaylight/commons/protocol-framework/src/main/java/org/opendaylight/protocol/framework/ProtocolSession.java
@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
+ *
+ * This program and the accompanying materials are made available under the
+ * terms of the Eclipse Public License v1.0 which accompanies this distribution,
+ * and is available at http://www.eclipse.org/legal/epl-v10.html
+ */
+package org.opendaylight.protocol.framework;
+
+import java.io.Closeable;
+
+/**
+ * Protocol Session represents the finite state machine in underlying protocol, including timers and its purpose is to
+ * create a connection between server and client. Session is automatically started, when TCP connection is created, but
+ * can be stopped manually. If the session is up, it has to redirect messages to/from user. Handles also malformed
+ * messages and unknown requests.
+ *
+ * This interface should be implemented by a final class representing a protocol specific session.
+ */
+public interface ProtocolSession<T> extends Closeable {
+    @Override
+    void close();
+}