Fix Javadoc warnings

Change-Id: Icf8b6b6f77ea80d3975aa975226a178145067adf
diff --git a/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentTreeMapCommands.java b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentTreeMapCommands.java
index 5fdcf3a..2d560c4 100644
--- a/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentTreeMapCommands.java
+++ b/core/store/primitives/src/main/java/org/onosproject/store/primitives/resources/impl/AtomixConsistentTreeMapCommands.java
@@ -499,7 +499,8 @@
 
     /**
      * Returns the smallest key larger than or equal to the specified key.
-     * @param <K>
+     *
+     * @param <K> key type
      */
     @SuppressWarnings("serial")
     public static class CeilingKey<K> extends KeyQuery<K> {