if (parts.get("/word/document.xml")!=null) {
packageResult = new WordprocessingMLPackage(ctm);
} else if (parts.get("/ppt/presentation.xml")!=null) {
packageResult = new PresentationMLPackage(ctm);
} else {
throw new Docx4JException("Unrecognised package");
}
log.info("Creating " + packageResult.getClass().getName() );
// 4. Start with _rels/.rels