private File createZipFileHandle() throws IOException {
  File zipFile=File.createTempFile("test","zip",tmpOutputFolder.getRoot());
  assertTrue(zipFile.delete());
  return zipFile;
}

private File createZipFileHandle ( ) throws IOException { File zipFile = File . createTempFile ( "test" , "zip" , tmpOutputFolder . getRoot ( ) ) ; assertTrue ( zipFile . delete ( ) ) ; return zipFile ; }
create a file object to which we can safely zip a file .
