public void saveFestival() throws IOException, NullPointerException{
		ObjectOutputStream objOut;
				if(festiFile.exists()){
					objOut = new ObjectOutputStream(new FileOutputStream(filePath));
					objOut.writeObject(festival);
					objOut.close();
				} else {
					festiFile.createNewFile();
					objOut = new ObjectOutputStream(new FileOutputStream(filePath));
					objOut.writeObject(festival);
					objOut.close();
				}
	}