Ah all

main_java_net_crackpixel_daysling_generator_Generator.java

package net.crackpixel.daysling.generator;

import com.grinderwolf.swm.api.SlimePlugin;
import com.grinderwolf.swm.api.world.SlimeWorld;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerJoinEvent;

public class Generator implements Listener {

    @EventHandler
    public void onPlayerJoin(PlayerJoinEvent e){
        Player player = e.getPlayer();
        if(!player.hasPlayedBefore()){
            SlimePlugin generator = (SlimePlugin) Bukkit.getPluginManager().getPlugin("SlimeWorldManager");
            SlimeWorld world = (SlimeWorld) Bukkit.getWorld("housingplot");
            generator.generateWorld(world.clone(String.format("%s_plot", player.getUniqueId())));
            World world1 = Bukkit.getWorld(String.format("%s_plot", player.getUniqueId()));
            Location location = new Location(world1, world1.getSpawnLocation().getX(),world1.getSpawnLocation().getY() ,world1.getSpawnLocation().getZ());
            player.teleport(location);
        }
        World world1 = Bukkit.getWorld(String.format("%s_plot", player.getUniqueId()));
        Location location = new Location(world1, world1.getSpawnLocation().getX(),world1.getSpawnLocation().getY() ,world1.getSpawnLocation().getZ());
        player.teleport(location);
    }
}

main_java_net_crackpixel_daysling_HousingGenerator.java

package net.crackpixel.daysling;

import net.crackpixel.daysling.generator.Generator;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.logging.Level;

public final class HousingGenerator extends JavaPlugin {

    public HousingGenerator instance = this;

    @Override
    public void onEnable() {
        // Plugin startup logic
        this.getLogger().log(Level.INFO, "Plugin is Ready To Yoink!");
        this.getServer().getPluginManager().registerEvents(new Generator(), this);
    }

    @Override
    public void onDisable() {
        // Plugin shutdown logic
        this.getLogger().log(Level.WARNING, "Plugin is Disabled!");
    }
}

main_resources_plugin.yml

name: HousingGenerator
version: ${project.version}
main: net.crackpixel.daysling.HousingGenerator
prefix: [Housing]
depend: [slimeworldgenerator, worldguard, placeholderapi]
authors: [daysling, Dreechu]
website: https://crackpixel.net