XMLStreamWriter2 sw = getDTDValidatingWriter(strw, dtdStr, nsAware, repairing);
sw.writeStartElement("root");
sw.writeStartElement("leaf");
sw.writeCharacters("whatever");
sw.writeEndElement();
sw.writeEndElement();
sw.writeEndDocument();
sw.close();
// Then one with no content
sw = getDTDValidatingWriter(strw, dtdStr, nsAware, repairing);