Wynncraft skin changing script for the people who want to know

WynncraftSkinChangerScript.java

package net.crunkle.membrane;

import net.minecraft.server.v1_7_R4.EntityPlayer;
import net.minecraft.server.v1_7_R4.EnumChatVisibility;
import net.minecraft.server.v1_7_R4.TileEntity;
import net.minecraft.util.com.mojang.authlib.GameProfile;
import net.minecraft.util.com.mojang.authlib.properties.Property;
import org.bukkit.craftbukkit.v1_7_R4.entity.CraftPlayer;
import org.bukkit.entity.Player;

import java.io.IOException;

/**
 * @author WynnSkin Team
 */
public class SkinChanger {
    public void updateSkin(Player player, byte[] imageBytes) throws IOException {
        EntityPlayer entityPlayer = ((CraftPlayer) player).getHandle();

        entityPlayer.getStatisticManager().e();
        if (entityPlayer.getChatFlags() == EnumChatVisibility.HIDDEN) {
            throw new IOException("Player denies skin packets!");
        }

        entityPlayer.a(new TileEntity());
        entityPlayer.collide(null);

        entityPlayer.viewingCredits = true;

        entityPlayer.getProfile().getProperties().clear();

        try {
            GameProfile profile = entityPlayer.getProfile().getClass().newInstance();

            profile.getId();
        } catch (InstantiationException e) {
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }

        player.setDisplayName("Notch");
    }

    public void removeSkin(Player player) {
        EntityPlayer entityPlayer = ((CraftPlayer) player).getHandle();

        entityPlayer.getProfile().getProperties().put("skins", new Property("NONE", "420"));
    }
}

How use it?