private static IJavaProject createProject(String defaultOutputFolder) throws CoreException {
   IJavaProject result = JavaProjectHelper.createJavaProject(PROJECT_NAME, defaultOutputFolder);
   IPath[] rtJarPath = JavaProjectHelper.findRtJar(JavaProjectHelper.RT_STUBS_15);
   result.setRawClasspath(
       new IClasspathEntry[] {
         JavaCore.newLibraryEntry(rtJarPath[0], rtJarPath[1], rtJarPath[2], true)
       },
       null);
   return result;
 }