--- a/src/java.xml.crypto/share/classes/org/jcp/xml/dsig/internal/dom/DOMStructure.java	Tue Mar 05 13:41:36 2019 +0100
+++ b/src/java.xml.crypto/share/classes/org/jcp/xml/dsig/internal/dom/DOMStructure.java	Tue Mar 05 08:24:58 2019 -0500
@@ -29,13 +29,24 @@
 package org.jcp.xml.dsig.internal.dom;
 
 import javax.xml.crypto.MarshalException;
-import javax.xml.crypto.XMLCryptoContext;
+import javax.xml.crypto.XMLStructure;
+import javax.xml.crypto.dom.DOMCryptoContext;
+import org.w3c.dom.Node;
 
 /**
  * DOM-based abstract implementation of XMLStructure.
  *
  */
-public abstract class DOMStructure extends BaseStructure {
+public abstract class DOMStructure implements XMLStructure {
 
-    public abstract void marshal(XmlWriter xwriter, String dsPrefix, XMLCryptoContext context) throws MarshalException;
+    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;
 }