Fix javadoc syntax error - @throw -> @throws

Change-Id: I91853be5b1a73d460425221439f011a28fd2c5cd
diff --git a/core/api/src/main/java/org/onosproject/store/service/ConsistentTreeMapBuilder.java b/core/api/src/main/java/org/onosproject/store/service/ConsistentTreeMapBuilder.java
index bb343da..2292892 100644
--- a/core/api/src/main/java/org/onosproject/store/service/ConsistentTreeMapBuilder.java
+++ b/core/api/src/main/java/org/onosproject/store/service/ConsistentTreeMapBuilder.java
@@ -54,7 +54,7 @@
      * to this builder.
      *
      * @return new distributed tree map
-     * @throw java.lang.RuntimeException if a mandatory parameter is missing
+     * @throws java.lang.RuntimeException if a mandatory parameter is missing
      */
     public abstract AsyncConsistentTreeMap<V> buildTreeMap();