public static void mkdirs(File directory) throws CreateDirectoryException {
    if (directory.exists()) {
      // file exists and *is* a directory
      if (directory.isDirectory()) {
        return;
      }

      // file exists, but is not a directory - delete it
      if (!directory.delete()) {
        throw new CreateDirectoryException(
            directory.getAbsolutePath(), new FileDeleteException(directory.getAbsolutePath()));
      }
    }

    // doesn't exist. Create one
    if (!directory.mkdirs() && !directory.isDirectory()) {
      throw new CreateDirectoryException(directory.getAbsolutePath());
    }
  }
Creates the specified directory, along with all parent paths if necessary

@param directory directory to be created
@throws CreateDirectoryException
fbcore/src/main/java/com/facebook/common/file/FileUtils.java