I dont know why my plugin wont work

package me.kitpvp.main;

import org.bukkit.ChatColor;
import org.bukkit.Material;
import org.bukkit.command.Command;
import org.bukkit.command.CommandSender;
import org.bukkit.enchantments.Enchantment;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.PluginManager;
import org.bukkit.plugin.java.JavaPlugin;

import me.kitpvp.listeners.PlayerListeners;

public class main extends JavaPlugin{

	private static main instance;

	public void log(String string) {
		System.out.println(string);
	}

	public static main getInstance(){
		return instance;
	}

	public void registerListeners(){
		PluginManager pm = getServer().getPluginManager();
		pm.registerEvents(new PlayerListeners(this), this);
	}

	public void registerCommands(){
		//not using this yet
	}

	//when the plugin is enabled
	@Override
	public void onEnable(){
		getLogger().info("has been enabled successfully!");
		instance = this;
		registerListeners();
		registerCommands();
	}

	//when the plugin is disabled
	@Override
	public void onDisable(){
		getLogger().info("has been disabled successfully!");
		instance = null;
	}

	//commands

	public boolean onCommand(CommandSender sender, Command cmd, String commandLabel, String[] args) {

	//kit pvp command
	if (cmd.getName().equalsIgnoreCase("kit pvp") && sender instanceof Player) {
		if(!sender.hasPermission("kit.pvp")) {
			return true;
		}
		Player p = (Player) sender;
		p.getInventory();
		ItemStack pvpsword = new ItemStack(Material.IRON_SWORD);
		ItemMeta m = pvpsword.getItemMeta();
		m.setDisplayName("" + ChatColor.GRAY + ChatColor.BOLD + "KitPvpSword");
		pvpsword.setItemMeta(m);
		pvpsword.addEnchantment(Enchantment.DURABILITY, 1);
		pvpsword.addEnchantment(Enchantment.DAMAGE_ALL, 2);
		p.getInventory().addItem(pvpsword);
		ItemStack pvpbow = new ItemStack(Material.BOW);
		ItemMeta m1 = pvpbow.getItemMeta();
		m1.setDisplayName("" + ChatColor.GRAY + ChatColor.BOLD + "KitPvpBow");
		pvpbow.setItemMeta(m1);
		pvpbow.addEnchantment(Enchantment.DURABILITY, 1);
		pvpbow.addEnchantment(Enchantment.ARROW_DAMAGE, 1);
		ItemStack pvphelmet = new ItemStack(Material.IRON_HELMET);
		ItemMeta m2 = pvphelmet.getItemMeta();
		m2.setDisplayName("" + ChatColor.GRAY + ChatColor.BOLD + "KitPvpHelmet");
		pvphelmet.setItemMeta(m2);
		pvphelmet.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 1);
		pvphelmet.addEnchantment(Enchantment.DURABILITY, 1);
		ItemStack pvpchestplate = new ItemStack(Material.IRON_CHESTPLATE);
		ItemMeta m3 = pvpchestplate.getItemMeta();
		m3.setDisplayName("" + ChatColor.GRAY + ChatColor.BOLD + "KitPvpChestplate");
		pvpchestplate.setItemMeta(m3);
		pvpchestplate.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 1);
		pvpchestplate.addEnchantment(Enchantment.DURABILITY, 1);
		ItemStack pvpleggings = new ItemStack(Material.IRON_LEGGINGS);
		ItemMeta m4 = pvpleggings.getItemMeta();
		m4.setDisplayName("" + ChatColor.GRAY + ChatColor.BOLD + "KitPvpLeggings");
		pvpleggings.setItemMeta(m4);
		pvpleggings.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 1);
		pvpleggings.addEnchantment(Enchantment.DURABILITY, 1);
		ItemStack pvpboots = new ItemStack(Material.IRON_BOOTS);
		ItemMeta m5 = pvpboots.getItemMeta();
		m5.setDisplayName("" + ChatColor.GRAY + ChatColor.BOLD + "KitPvpBoots");
		pvpboots.setItemMeta(m5);
		pvpboots.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 1);
		pvpboots.addEnchantment(Enchantment.DURABILITY, 1);
		p.getInventory().addItem(new ItemStack(Material.GOLDEN_APPLE, 10));
		p.getInventory().addItem(pvphelmet);
		p.getInventory().addItem(pvpchestplate);
		p.getInventory().addItem(pvpleggings);
		p.getInventory().addItem(pvpboots);
		p.getInventory().addItem(new ItemStack(Material.ARROW, 32));
		p.sendMessage("" + ChatColor.AQUA + "You have recieved the kit" + ChatColor.BOLD + ChatColor.GREEN + "pvp");
		return true;
	}
	//end of kit pvp command

	//kit vip command

	if (cmd.getName().equalsIgnoreCase("kit vip") && sender instanceof Player) {
		if(!sender.hasPermission("kit.vip")) {
			sender.sendMessage(ChatColor.RED + "You do not have permission to use this command!");
			return true;
		}
		Player p = (Player) sender;
		p.getInventory();
		ItemStack vipsword = new ItemStack(Material.IRON_SWORD);
		ItemMeta m = vipsword.getItemMeta();
		m.setDisplayName("" + ChatColor.AQUA + ChatColor.BOLD + "KitVipSword");
		vipsword.setItemMeta(m);
		vipsword.addEnchantment(Enchantment.DURABILITY, 2);
		vipsword.addEnchantment(Enchantment.DAMAGE_ALL, 3);
		p.getInventory().addItem(vipsword);
		ItemStack vipbow = new ItemStack(Material.BOW);
		ItemMeta m1 = vipbow.getItemMeta();
		m1.setDisplayName("" + ChatColor.AQUA + ChatColor.BOLD + "KitVipBow");
		vipbow.setItemMeta(m1);
		vipbow.addEnchantment(Enchantment.DURABILITY, 2);
		vipbow.addEnchantment(Enchantment.ARROW_DAMAGE, 2);
		ItemStack viphelmet = new ItemStack(Material.IRON_HELMET);
		ItemMeta m2 = viphelmet.getItemMeta();
		m2.setDisplayName("" + ChatColor.AQUA + ChatColor.BOLD + "KitVipHelmet");
		viphelmet.setItemMeta(m2);
		viphelmet.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 3);
		viphelmet.addEnchantment(Enchantment.DURABILITY, 2);
		ItemStack vipchestplate = new ItemStack(Material.IRON_CHESTPLATE);
		ItemMeta m3 = vipchestplate.getItemMeta();
		m3.setDisplayName("" + ChatColor.AQUA + ChatColor.BOLD + "KitVipChestplate");
		vipchestplate.setItemMeta(m3);
		vipchestplate.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 3);
		vipchestplate.addEnchantment(Enchantment.DURABILITY, 2);
		ItemStack vipleggings = new ItemStack(Material.IRON_LEGGINGS);
		ItemMeta m4 = vipleggings.getItemMeta();
		m4.setDisplayName("" + ChatColor.AQUA + ChatColor.BOLD + "KitVipLeggings");
		vipleggings.setItemMeta(m4);
		vipleggings.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 3);
		vipchestplate.addEnchantment(Enchantment.DURABILITY, 2);
		ItemStack vipboots = new ItemStack(Material.IRON_BOOTS);
		ItemMeta m5 = vipboots.getItemMeta();
		m5.setDisplayName("" + ChatColor.AQUA + ChatColor.BOLD + "KitVipBoots");
		vipboots.setItemMeta(m5);
		vipboots.addEnchantment(Enchantment.PROTECTION_ENVIRONMENTAL, 3);
		vipboots.addEnchantment(Enchantment.DURABILITY, 2);
		p.getInventory().addItem(new ItemStack(Material.GOLDEN_APPLE, 10));
		p.getInventory().addItem(viphelmet);
		p.getInventory().addItem(vipchestplate);
		p.getInventory().addItem(vipleggings);
		p.getInventory().addItem(vipboots);
		p.getInventory().addItem(new ItemStack(Material.ARROW, 32));
		p.getInventory().addItem(new ItemStack(Material.ENCHANTED_GOLDEN_APPLE, 1));
		p.sendMessage("" + ChatColor.AQUA + "You have recieved the kit" + ChatColor.BOLD + ChatColor.GOLD + "Vip");
		return true;
	}

		return false;
	}

}