Fixing javadocs.

Change-Id: I3c9b2abdb9dcc6fac6c68d6db19585ef4521b6ac
diff --git a/core/api/src/main/java/org/onosproject/net/group/DefaultGroupDescription.java b/core/api/src/main/java/org/onosproject/net/group/DefaultGroupDescription.java
index 5ea2d2e..a5b8e94 100644
--- a/core/api/src/main/java/org/onosproject/net/group/DefaultGroupDescription.java
+++ b/core/api/src/main/java/org/onosproject/net/group/DefaultGroupDescription.java
@@ -49,6 +49,7 @@
      * @param buckets immutable list of group bucket
      * @param appCookie immutable application cookie of type DefaultGroupKey
      * to be associated with the group
+     * @param groupId group identifier
      * @param appId application id
      */
     public DefaultGroupDescription(DeviceId deviceId,