--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.xml.crypto/share/classes/org/jcp/xml/dsig/internal/dom/DOMStructure.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,53 @@
+/*
+ * reserved comment block
+ * DO NOT REMOVE OR ALTER!
+ */
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied. See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+/*
+ * Copyright (c) 2005, 2013, Oracle and/or its affiliates. All rights reserved.
+ */
+/*
+ * $Id: DOMStructure.java 1197150 2011-11-03 14:34:57Z coheigea $
+ */
+package org.jcp.xml.dsig.internal.dom;
+
+import javax.xml.crypto.MarshalException;
+import javax.xml.crypto.XMLStructure;
+import javax.xml.crypto.dom.DOMCryptoContext;
+import org.w3c.dom.Node;
+
+/**
+ * DOM-based abstract implementation of XMLStructure.
+ *
+ * @author Sean Mullan
+ */
+public abstract class DOMStructure implements XMLStructure {
+
+    public final boolean isFeatureSupported(String feature) {
+        if (feature == null) {
+            throw new NullPointerException();
+        } else {
+            return false;
+        }
+    }
+
+    public abstract void marshal(Node parent, String dsPrefix,
+        DOMCryptoContext context) throws MarshalException;
+}