code: public static Node addDomAttr(Document doc, String tagName,
              String tagNamespaceURI, String attrName, String attrValue) {
  
          // Create a Document to work on
          Document newDoc = null;
          try {
              System.setProperty("javax.xml.parsers.DocumentBuilderFactory",
                      "org.apache.xerces.jaxp.DocumentBuilderFactoryImpl");
              DocumentBuilderFactory dbf = DocumentBuilderFactory.newInstance();
              dbf.setNamespaceAware(true);
              DocumentBuilder db = dbf.newDocumentBuilder();
              newDoc = db.newDocument();
          } catch (Exception e) {
              e.printStackTrace();
              // Fortify Mod: If we got here there is no point going any further
              return null;
          }
  
          Transformer identity = null;
          try {
              TransformerFactory TF = TransformerFactory.newInstance();
                 // Fortify Mod: disable external entity injection
              TF.setFeature(XMLConstants.FEATURE_SECURE_PROCESSING, true);
              identity = TF.newTransformer();
  		    // End Fortify Mod
              identity.transform(new DOMSource(doc), new DOMResult(newDoc));
          } catch (Exception ex) {
              System.out.println("ERROR: " + ex.getMessage());
          }
  
          // Get all named nodes in the doucment
          NodeList namedTags = newDoc.getElementsByTagNameNS(tagNamespaceURI,
                  tagName);
          for (int i = 0; i < namedTags.getLength(); i++) {
              // Add the attribute to each one
              Element element = (Element) namedTags.item(i);
              element.setAttribute(attrName, attrValue);
          }
  
          // displayNode(newDoc);
          return (Node) newDoc;
      }
docs: Adds the attribute to each node in the Document with the given name.
  
  @param doc
  the Document to add attributes to
  @param tagName
  the local name of the nodes to add the attribute to
  @param tagNamespaceURI
  the namespace uri of the nodes to add the attribute to
  @param attrName
  the name of the attribute to add
  @param attrValue
  the value of the attribute to add
  
  @return the original Document with the update attribute nodes