MC - Permission Manager

import java.util.HashMap;
import java.util.UUID;

import org.bukkit.entity.Player;
import org.bukkit.permissions.Permission;
import org.bukkit.permissions.PermissionAttachment;
import org.bukkit.plugin.java.JavaPlugin;

public class EPerm {

    private HashMap<UUID, PermissionAttachment> map = new HashMap<UUID, PermissionAttachment>();

    private JavaPlugin plugin;
    public EPerm(JavaPlugin pl) {
        this.plugin = pl;
    }

    private PermissionAttachment getAttachment(Player player) {
        if (map.containsKey(player.getUniqueId())) return map.get(player.getUniqueId());
        PermissionAttachment perma = player.addAttachment(plugin);
        map.put(player.getUniqueId(), perma);
        return perma;
    }

    private void updateInfo(Player player, PermissionAttachment perma) {
        map.put(player.getUniqueId(), perma);
    }

    public void addPermission(Player player, String perm) {
        PermissionAttachment perma = getAttachment(player);
        perma.setPermission(perm, true);
        updateInfo(player, perma);
        player.recalculatePermissions();
    }

    public void removePermission(Player player, String perm) {
        PermissionAttachment perma = getAttachment(player);
        perma.unsetPermission(perm);
        updateInfo(player, perma);
        player.recalculatePermissions();
    }

    public void addPermission(Player player, Permission perm) {
        PermissionAttachment perma = getAttachment(player);
        perma.setPermission(perm, true);
        updateInfo(player, perma);
        player.recalculatePermissions();
    }

    public void removePermission(Player player, Permission perm) {
        PermissionAttachment perma = getAttachment(player);
        perma.unsetPermission(perm);
        updateInfo(player, perma);
        player.recalculatePermissions();
    }

}