static void addManifestReference(Manifest manifest,String uri) throws Exception {
  manifest.addDocument(null,"#" + uri,null,DEFAULT_DIGEST_ALGORITHM_URI,null,null);
}

static void addManifestReference ( Manifest manifest , String uri ) throws Exception { manifest . addDocument ( null , "#" + uri , null , DEFAULT_DIGEST_ALGORITHM_URI , null , null ) ; }
shortcut for adding a reference to a manifest .
