Fix javadoc error

Change-Id: I9bc7fbc93cc63c0b3fe0ed8c71b363dff78a6811
diff --git a/core/api/src/main/java/org/onosproject/store/service/AsyncDocumentTree.java b/core/api/src/main/java/org/onosproject/store/service/AsyncDocumentTree.java
index 976772e..8b08b76 100644
--- a/core/api/src/main/java/org/onosproject/store/service/AsyncDocumentTree.java
+++ b/core/api/src/main/java/org/onosproject/store/service/AsyncDocumentTree.java
@@ -41,7 +41,7 @@
      *
      * @param path path to the node
      * @return future for mapping from child name to child value
-     * @throws {@code NoSuchDocumentPathException} if the path does not point to a valid node
+     * @throws NoSuchDocumentPathException if the path does not point to a valid node
      */
     CompletableFuture<Map<String, Versioned<V>>> getChildren(DocumentPath path);