private void makeCacheDirectory(){
  File cacheDir=new File(CACHE_DIRECTORY);
  if (!cacheDir.exists()) {
    cacheDir.mkdir();
  }
}

private void makeCacheDirectory ( ) { File cacheDir = new File ( CACHE_DIRECTORY ) ; if ( ! cacheDir . exists ( ) ) { cacheDir . mkdir ( ) ; } }
creates directory for cache files if it doesn ' t already exist
