code: private File makeGlobalJar() throws IOException {
      final File jarFile = new File(this.fileNames.getGlobalFolderName() + this.fileNames.getJarFileSuffix());
      new JARFileMaker(jarFile).addChildren(this.fileNames.getGlobalFolder()).close();
      return jarFile;
    }
docs: Creates the JAR file for upload.
  
  @return
  @throws IOException