code: public static void generate(ConfigurationImpl configuration) {
          FrameOutputWriter framegen;
          DocPath filename = DocPath.empty;
          try {
              filename = DocPaths.INDEX;
              framegen = new FrameOutputWriter(configuration, filename);
              framegen.generateFrameFile();
              framegen.close();
          } catch (IOException exc) {
              configuration.standardmessage.error(
                          "doclet.exception_encountered",
                          exc.toString(), filename);
              throw new DocletAbortException(exc);
          }
      }
docs: Construct FrameOutputWriter object and then use it to generate the Html
  file which will have the description of all the frames in the
  documentation. The name of the generated file is "index.html" which is
  the default first file for Html documents.
  @throws DocletAbortException