gistfile1.java

 public static void writeStringToFile(final File file, final String data) {
    try {
      final OutputStream outputStream = new BufferedOutputStream(
              new FileOutputStream(file, false));
      outputStream.write(data.getBytes("UTF-8"));
      outputStream.close();
    } catch (IOException e) {
      throw new RuntimeException("could not write file for debug cache", e);
    }

    try {
      int start = data.indexOf("package");
      if (start != -1) {
        int end = data.indexOf(";", start);
        String packageName = data.substring(8, end).trim();
        // creates a copy of the generated file with the correct package dirs
        String packageDirs = packageName.replace(".", "/");
        String parentPath = file.getParent();
        
        if (!parentPath.endsWith(packageDirs)) {
          // only write it if the original file was not in the right hierarchy
          String packagePath = parentPath + "/java/" + packageDirs;
          new File(packagePath).mkdirs();
          final OutputStream outputStream = new BufferedOutputStream(
                  new FileOutputStream(packagePath + "/" + file.getName(),
                          false));
          outputStream.write(data.getBytes("UTF-8"));
          outputStream.close();
        }
      }
    } catch (IOException e) {
      throw new RuntimeException("could not write file for debug cache", e);
    }

  }