如何在bukkit中存储变量的变量？

import org.bukkit.plugin.java.JavaPlugin;
import java.util.HashMap;

public class MyPlugin extends JavaPlugin {
    private HashMap<String, Object> variableStorage;

    @Override
    public void onEnable() {
        variableStorage = new HashMap<>();
        
        // 存储变量
        String playerName = "John";
        variableStorage.put("playerName", playerName);
        
        int playerScore = 100;
        variableStorage.put("playerScore", playerScore);
        
        // 获取变量
        String storedName = (String) variableStorage.get("playerName");
        int storedScore = (int) variableStorage.get("playerScore");
        
        getLogger().info("Stored Name: " + storedName);
        getLogger().info("Stored Score: " + storedScore);
    }
}