Added @Beta annotation to the flow objective API.

Change-Id: I4dd91921db1ff533b0ea1e3244dcdbf08b64a499
diff --git a/core/api/src/main/java/org/onosproject/net/flowobjective/FlowObjectiveStoreDelegate.java b/core/api/src/main/java/org/onosproject/net/flowobjective/FlowObjectiveStoreDelegate.java
index 5af7836..2189af1 100644
--- a/core/api/src/main/java/org/onosproject/net/flowobjective/FlowObjectiveStoreDelegate.java
+++ b/core/api/src/main/java/org/onosproject/net/flowobjective/FlowObjectiveStoreDelegate.java
@@ -15,10 +15,12 @@
  */
 package org.onosproject.net.flowobjective;
 
+import com.google.common.annotations.Beta;
 import org.onosproject.store.StoreDelegate;
 
 /**
  * Flow Objective store delegate abstraction.
  */
+@Beta
 public interface FlowObjectiveStoreDelegate extends StoreDelegate<ObjectiveEvent> {
 }