private void persist() {
		// 
		File file = new File(NAMOO_CLUB_DAT);
		File dataFolder = file.getParentFile();
		if (dataFolder.exists() == false) {
			dataFolder.mkdirs();
		}
		
		FileOutputStream fos = null;
		ObjectOutputStream oos = null;
		try {
			fos = new FileOutputStream(file);
			oos = new ObjectOutputStream(fos);
			
			oos.writeObject(objectMap);
		} catch (IOException e) {
			e.printStackTrace();
		} finally {
			try {
				if (oos != null) oos.close();
				if (fos != null) fos.close();
			} catch (Exception e){}
		}
		
	}