Fixing javadoc warnings, provided missing package javadocs and corrected group structure.

Change-Id: I2637afe49b81e8e6d10ef3bb0f2a1cf50b2564cc
diff --git a/src/main/java/org/onosproject/segmentrouting/PolicyHandler.java b/src/main/java/org/onosproject/segmentrouting/PolicyHandler.java
index 0fcfee4..9a2a891 100644
--- a/src/main/java/org/onosproject/segmentrouting/PolicyHandler.java
+++ b/src/main/java/org/onosproject/segmentrouting/PolicyHandler.java
@@ -59,10 +59,11 @@
     /**
      * Creates a reference.
      *
-     * @param appId segment routing application ID
-     * @param deviceConfiguration DeviceConfiguration reference
+     * @param appId                segment routing application ID
+     * @param deviceConfiguration  DeviceConfiguration reference
      * @param flowObjectiveService FlowObjectiveService reference
-     * @param policyStore policy store
+     * @param tunnelHandler        tunnel handler reference
+     * @param policyStore          policy store
      */
     public PolicyHandler(ApplicationId appId,
                          DeviceConfiguration deviceConfiguration,