Fixed javadoc error.

Change-Id: I591d9de7016c5e26f178614fc96f42150398bb27
diff --git a/core/api/src/main/java/org/onosproject/store/service/DocumentTree.java b/core/api/src/main/java/org/onosproject/store/service/DocumentTree.java
index 5a86009..46a334b 100644
--- a/core/api/src/main/java/org/onosproject/store/service/DocumentTree.java
+++ b/core/api/src/main/java/org/onosproject/store/service/DocumentTree.java
@@ -75,7 +75,7 @@
      * Removes the node with the specified path.
      *
      * is not a leaf node i.e has one or more children
-     * @param path path for the node to remove
+     * @param key path for the node to remove
      * @return the previous value of the node or {@code null} if it did not exist
      * @throws IllegalDocumentModificationException if the remove to be removed
      */