minor Kryo related cleanup

Change-Id: I772fc1f776563d30f1a4081c6fddd5739d985263
diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/DefaultPortSerializer.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/DefaultPortSerializer.java
index 8455e80..5dc310b 100644
--- a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/DefaultPortSerializer.java
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/DefaultPortSerializer.java
@@ -16,7 +16,7 @@
         Serializer<DefaultPort> {
 
     /**
-     * Default constructor.
+     * Creates {@link DefaultPort} serializer instance.
      */
     public DefaultPortSerializer() {
         // non-null, immutable