diff --git a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/routerinterface/impl/RouterInterfaceManager.java b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/routerinterface/impl/RouterInterfaceManager.java
index dd8d06d..854efd9 100644
--- a/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/routerinterface/impl/RouterInterfaceManager.java
+++ b/apps/vtn/vtnrsc/src/main/java/org/onosproject/vtnrsc/routerinterface/impl/RouterInterfaceManager.java
@@ -15,19 +15,7 @@
  */
 package org.onosproject.vtnrsc.routerinterface.impl;
 
-import static com.google.common.base.Preconditions.checkNotNull;
-import static org.slf4j.LoggerFactory.getLogger;
-
-import java.util.Collection;
-import java.util.Collections;
-import java.util.Set;
-
-import org.apache.felix.scr.annotations.Activate;
-import org.apache.felix.scr.annotations.Component;
-import org.apache.felix.scr.annotations.Deactivate;
-import org.apache.felix.scr.annotations.Reference;
-import org.apache.felix.scr.annotations.ReferenceCardinality;
-import org.apache.felix.scr.annotations.Service;
+import com.google.common.collect.Sets;
 import org.onlab.util.KryoNamespace;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.core.CoreService;
@@ -48,15 +36,24 @@
 import org.onosproject.vtnrsc.routerinterface.RouterInterfaceService;
 import org.onosproject.vtnrsc.subnet.SubnetService;
 import org.onosproject.vtnrsc.virtualport.VirtualPortService;
+import org.osgi.service.component.annotations.Activate;
+import org.osgi.service.component.annotations.Component;
+import org.osgi.service.component.annotations.Deactivate;
+import org.osgi.service.component.annotations.Reference;
+import org.osgi.service.component.annotations.ReferenceCardinality;
 import org.slf4j.Logger;
 
-import com.google.common.collect.Sets;
+import java.util.Collection;
+import java.util.Collections;
+import java.util.Set;
+
+import static com.google.common.base.Preconditions.checkNotNull;
+import static org.slf4j.LoggerFactory.getLogger;
 
 /**
  * Provides implementation of the Router interface service.
  */
-@Component(immediate = true)
-@Service
+@Component(immediate = true, service = RouterInterfaceService.class)
 public class RouterInterfaceManager implements RouterInterfaceService {
     private static final String SUBNET_ID_NULL = "Subnet ID cannot be null";
     private static final String ROUTER_INTERFACE_NULL = "Router Interface cannot be null";
@@ -73,19 +70,19 @@
     protected EventuallyConsistentMap<SubnetId, RouterInterface> routerInterfaceStore;
     protected ApplicationId appId;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected StorageService storageService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected CoreService coreService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected VirtualPortService virtualPortService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected SubnetService subnetService;
 
-    @Reference(cardinality = ReferenceCardinality.MANDATORY_UNARY)
+    @Reference(cardinality = ReferenceCardinality.MANDATORY)
     protected RouterService routerService;
 
     @Activate