Enahnced link and host stores to extend general store.
diff --git a/core/net/src/main/java/org/onlab/onos/net/device/impl/DeviceManager.java b/core/net/src/main/java/org/onlab/onos/net/device/impl/DeviceManager.java
index 9b6c83a..e0be29a 100644
--- a/core/net/src/main/java/org/onlab/onos/net/device/impl/DeviceManager.java
+++ b/core/net/src/main/java/org/onlab/onos/net/device/impl/DeviceManager.java
@@ -26,6 +26,7 @@
 import org.onlab.onos.net.device.DeviceProviderService;
 import org.onlab.onos.net.device.DeviceService;
 import org.onlab.onos.net.device.DeviceStore;
+import org.onlab.onos.net.device.DeviceStoreDelegate;
 import org.onlab.onos.net.device.PortDescription;
 import org.onlab.onos.net.provider.AbstractProviderRegistry;
 import org.onlab.onos.net.provider.AbstractProviderService;
@@ -33,8 +34,8 @@
 
 import java.util.List;
 
-import static org.onlab.onos.net.device.DeviceEvent.Type.*;
 import static com.google.common.base.Preconditions.checkNotNull;
+import static org.onlab.onos.net.device.DeviceEvent.Type.DEVICE_MASTERSHIP_CHANGED;
 import static org.slf4j.LoggerFactory.getLogger;
 
 /**
@@ -57,6 +58,8 @@
     protected final AbstractListenerRegistry<DeviceEvent, DeviceListener>
             listenerRegistry = new AbstractListenerRegistry<>();
 
+    private DeviceStoreDelegate delegate = new InternalStoreDelegate();
+
     private final MastershipListener mastershipListener = new InnerMastershipListener();
 
     @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
@@ -73,6 +76,7 @@
 
     @Activate
     public void activate() {
+        store.setDelegate(delegate);
         eventDispatcher.addSink(DeviceEvent.class, listenerRegistry);
         mastershipService.addListener(mastershipListener);
         log.info("Started");
@@ -80,6 +84,7 @@
 
     @Deactivate
     public void deactivate() {
+        store.unsetDelegate(delegate);
         mastershipService.removeListener(mastershipListener);
         eventDispatcher.removeSink(DeviceEvent.class);
         log.info("Stopped");
@@ -248,4 +253,12 @@
             }
         }
     }
+
+    // Store delegate to re-post events emitted from the store.
+    private class InternalStoreDelegate implements DeviceStoreDelegate {
+        @Override
+        public void notify(DeviceEvent event) {
+            post(event);
+        }
+    }
 }