[ONOS-7054] Implement prototype of ISSU protocol

Change-Id: Id543c0de9c97b68f977c824cbc987b35d81beb2d
diff --git a/core/store/dist/src/main/java/org/onosproject/store/cluster/messaging/impl/UnifiedClusterCommunicationManager.java b/core/store/dist/src/main/java/org/onosproject/store/cluster/messaging/impl/UnifiedClusterCommunicationManager.java
new file mode 100644
index 0000000..45c84af
--- /dev/null
+++ b/core/store/dist/src/main/java/org/onosproject/store/cluster/messaging/impl/UnifiedClusterCommunicationManager.java
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2017-present Open Networking Foundation
+ *
+ * Licensed 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.onosproject.store.cluster.messaging.impl;
+
+import org.apache.felix.scr.annotations.Component;
+import org.apache.felix.scr.annotations.Service;
+import org.onosproject.store.cluster.messaging.UnifiedClusterCommunicationService;
+import org.onosproject.store.cluster.messaging.MessageSubject;
+
+@Component(immediate = true)
+@Service
+public class UnifiedClusterCommunicationManager
+        extends AbstractClusterCommunicationManager
+        implements UnifiedClusterCommunicationService {
+    @Override
+    protected String getType(MessageSubject subject) {
+        return subject.value();
+    }
+}