import org.bukkit.configuration.serialization.ConfigurationSerialization;
@SuppressWarnings("unchecked")
	@Override
	public void onEnable(){

		File f = new File(this.getDataFolder() + "/database/" + "data.hashmap");
		map = HashBiMap.create();
		if(!f.exists()){
			System.out.println("Hashmap not found, creating a new one");
			map = HashBiMap.create();
		}else{
			try{
				System.out.println("Hashmap found, loading...");
				FileInputStream fileIn = new FileInputStream(this.getDataFolder() + "/database/" + "data.hashmap");
				ObjectInputStream in = new ObjectInputStream(fileIn);

                		Map<String, Object> inMap = in.readObject();
				for (Map.Entry<String, Object> entry : inMap.entrySet()) {
					BlockVector bvec = (BlockVector) ConfigurationSerialization.deserializeObject(entry.getValue());
					map.put(entry.getKey(), bvec);
				}
				in.close();
				fileIn.close();
			}catch (Exception e){
				e.printStackTrace();
			}
		}

		getServer().getPluginManager().registerEvents(this, this);
	}

	@Override
	public void onDisable(){
                Map<String, Object> outMap = new HashMap<String, Object>();
                for (Map.Entry<String, BlockVector> entry : map.entrySet()) {
                        Map<String, Object> ser = entry.getValue().serialize();
                        ser.put(ConfigurationSerialization.SERIALIZED_TYPE_KEY, "BlockVector");
                        outMap.put(entry.getKey(), ser);
                }
		try{
			 System.out.println("Saving hashmap...");
			 FileOutputStream fileOut = new
			 FileOutputStream(this.getDataFolder() + "/database/" +
			 "data.hashmap");
			 ObjectOutputStream out = new ObjectOutputStream(fileOut);
			 out.writeObject(outMap);
			 out.flush();
			 out.close();
			 fileOut.flush();
			 fileOut.close();
		}catch (Exception e){
			e.printStackTrace();
		}
	}