Permissions for Graham

Player.java

import java.util.ArrayList;
public class Player extends LivingEntity {

    private ArrayList<String> permissions = new ArrayList<String>();

    //(Load the permissions, of course. I used Json and Yaml in two projects, but I'm sure you'll have something better)

    public boolean hasPermission(String requestedPermission) {
        if (permissions.contains("*"))
            return true;

        for (String permission : this.permissions) {
            if (permission.startsWith(requestedPermission))
                return true;
        }

        return false;
    }

    //And your other code, of course

}