Fixed javadocs and descriptions.

Change-Id: I92147b858d8012c957cc03fab2d306740161e2f3
diff --git a/src/main/java/org/onosproject/segmentrouting/RoutingRulePopulator.java b/src/main/java/org/onosproject/segmentrouting/RoutingRulePopulator.java
index 2d2102b..154127e 100644
--- a/src/main/java/org/onosproject/segmentrouting/RoutingRulePopulator.java
+++ b/src/main/java/org/onosproject/segmentrouting/RoutingRulePopulator.java
@@ -74,6 +74,8 @@
 
     /**
      * Returns the number of rules populated.
+     *
+     * @return number of rules
      */
     public long getCounter() {
         return rulePopulationCounter.get();