diff --git a/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/FlowClassifierInstallerService.java b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/FlowClassifierInstallerService.java
index 9a66ffa71a..fd9195661b 100644
--- a/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/FlowClassifierInstallerService.java
+++ b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/FlowClassifierInstallerService.java
@@ -30,6 +30,7 @@ public interface FlowClassifierInstallerService {
      *
      * @param portChain port-chain
      * @param nshSpiId service path index identifier
+     * @return connectPoint the network identifier
      */
     ConnectPoint installFlowClassifier(PortChain portChain, NshServicePathId nshSpiId);
 
@@ -38,6 +39,7 @@ public interface FlowClassifierInstallerService {
      *
      * @param portChain port-chain
      * @param nshSpiId service path index identifier
+     * @return connectPoint the network identifier
      */
     ConnectPoint unInstallFlowClassifier(PortChain portChain, NshServicePathId nshSpiId);
 
@@ -47,6 +49,7 @@ public interface FlowClassifierInstallerService {
      * @param portChain port-chain
      * @param fiveTuple five tuple packet information
      * @param nshSpiId service path index identifier
+     * @return connectPoint the network identifier
      */
     ConnectPoint installLoadBalancedFlowClassifier(PortChain portChain, FiveTuple fiveTuple,
                                                    NshServicePathId nshSpiId);
@@ -57,6 +60,7 @@ public interface FlowClassifierInstallerService {
      * @param portChain port-chain
      * @param fiveTuple five tuple packet information
      * @param nshSpiId service path index identifier
+     * @return connectPoint the network identifier
      */
     ConnectPoint unInstallLoadBalancedFlowClassifier(PortChain portChain, FiveTuple fiveTuple,
                                                      NshServicePathId nshSpiId);
diff --git a/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/impl/FlowClassifierInstallerImpl.java b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/impl/FlowClassifierInstallerImpl.java
index 70d1d214ac..7879538905 100644
--- a/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/impl/FlowClassifierInstallerImpl.java
+++ b/apps/vtn/sfcmgr/src/main/java/org/onosproject/sfc/installer/impl/FlowClassifierInstallerImpl.java
@@ -332,9 +332,11 @@ public class FlowClassifierInstallerImpl implements FlowClassifierInstallerServi
      * Pack traffic treatment.
      *
      * @param deviceId device id
+     * @param port port number
      * @param nshDstPort vxlan tunnel port for nsh header
      * @param nshSpi nsh spi
      * @param flowClassifier flow-classifier
+     * @param isSameOvs whether the next service function is in same ovs
      * @return traffic treatment
      */
     public TrafficTreatment.Builder packTrafficTreatment(DeviceId deviceId, PortNumber port,