private void _configureTaskAppJavadoc(Project project, String appTitle, String appVersion) {

    Javadoc javadoc =
        (Javadoc) GradleUtil.getTask(project, AppJavadocBuilderPlugin.APP_JAVADOC_TASK_NAME);

    File portalRootDir = GradleUtil.getRootDir(project.getRootProject(), "portal-impl");

    if (portalRootDir != null) {
      File stylesheetFile = new File(portalRootDir, "tools/styles/javadoc.css");

      if (stylesheetFile.exists()) {
        StandardJavadocDocletOptions standardJavadocDocletOptions =
            (StandardJavadocDocletOptions) javadoc.getOptions();

        standardJavadocDocletOptions.setStylesheetFile(stylesheetFile);
      }
    }

    if (Validator.isNotNull(appTitle) && Validator.isNotNull(appVersion)) {
      String title = String.format("%s %s API", appTitle, appVersion);

      javadoc.setTitle(title);
    }
  }