ONOS-885: Group store interface definition and in-memory store implementation

Change-Id: I1125fbc23f1e58bcb8aaf5f67c02da610fa7ef25

ONOS-885: Group store interface definition and in-memory store implementation

Change-Id: Id3794bed63785e10ed86c0b5d90bf875d127224c
diff --git a/core/api/src/main/java/org/onosproject/net/group/GroupProvider.java b/core/api/src/main/java/org/onosproject/net/group/GroupProvider.java
index 35d949f..6757e66 100644
--- a/core/api/src/main/java/org/onosproject/net/group/GroupProvider.java
+++ b/core/api/src/main/java/org/onosproject/net/group/GroupProvider.java
@@ -19,12 +19,12 @@
 import org.onosproject.net.provider.Provider;
 
 /**
- * Abstraction of a flow rule provider.
+ * Abstraction of group provider.
  */
 public interface GroupProvider extends Provider {
 
     /**
-     * Perform a group operation in the specified device with the
+     * Performs a batch of group operation in the specified device with the
      * specified parameters.
      *
      * @param deviceId device identifier on which the batch of group