MAIN :

package me.kyrp.MaxSpeedz;

import org.bukkit.ChatColor;
import org.bukkit.Server;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin {

	public void onDisable(){
		System.out.println("[MaxSpeedz] Disabled");

	}

	public void onEnable() {
		System.out.println("[MaxSpeedz] Enabled.");
		this.getServer().getPluginManager().registerEvents(new Events(), this); {

		}
		}

    public boolean onCommand(CommandSender sender, Command cmd, String commandText, String[] args){
    	Player player = (Player)sender;
        if(sender instanceof Player){
    		Server server = player.getServer();
        }
        if(cmd.getName().equalsIgnoreCase("bafk")){
            server.broadcastMessage(ChatColor.GOLD + playername + " is now AFK "); {
		return false;

	    }

	}


EVENTS:
package me.kyrp.MaxSpeedz;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.Server;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockPlaceEvent;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;

public class Events implements Listener {

	@EventHandler(priority = EventPriority.NORMAL)
	public void onBlockPlace(BlockPlaceEvent event) {
		Player player = event.getPlayer();
		String playername = player.getName();
		Server server = player.getServer();
		Material material = event.getBlock().getType();
		server.broadcastMessage(ChatColor.GOLD + playername +  " has placed: " + material);
		player.addPotionEffect(new PotionEffect(PotionEffectType.HEAL, 7000, 6));
		player.addPotionEffect(new PotionEffect(PotionEffectType.REGENERATION, 7000, 6));
		player.addPotionEffect(new PotionEffect(PotionEffectType.FIRE_RESISTANCE, 7000, 6));
		player.addPotionEffect(new PotionEffect(PotionEffectType.DAMAGE_RESISTANCE, 7000, 6));
		player.addPotionEffect(new PotionEffect(PotionEffectType.INCREASE_DAMAGE, 7000, 6));



	}

}