minor Kryo related cleanup

Change-Id: I772fc1f776563d30f1a4081c6fddd5739d985263
diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/IpPrefixSerializer.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/IpPrefixSerializer.java
index 2dbec57..2e92692 100644
--- a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/IpPrefixSerializer.java
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/IpPrefixSerializer.java
@@ -13,7 +13,7 @@
 public final class IpPrefixSerializer extends Serializer<IpPrefix> {
 
     /**
-     * Default constructor.
+     * Creates {@link IpPrefix} serializer instance.
      */
     public IpPrefixSerializer() {
         // non-null, immutable