code: public void addFile(String zipEntry, byte[] data) throws IOException  {
  		stream.putNextEntry(new ZipEntry(zipEntry));
  		stream.write(data);
  	}
docs: Adds a file to the ZIP archive, given its content as an array of bytes.
  
  @param zipEntry
  name of the entry in the archive.
  @param data
  data bytes to be stored as file contents in the archive.