public class CooldownManager {

    public Map<UUID, Long> cooldowns;

    public CooldownManager() {
        this.cooldowns = new HashMap<UUID, Long>();
    }

    public void addCooldown(final Player player) {
        final long time = System.currentTimeMillis();
        this.cooldowns.put(player.getUniqueId(), time);
    }

    public void removeCooldown(final Player player) {
        this.cooldowns.remove(player.getUniqueId());
    }

    public boolean hasCooldown(final Player player, final int timer) {
        if (!this.cooldowns.containsKey(player.getUniqueId())) {
            return false;
        }
        final long now = System.currentTimeMillis();
        final long time = this.cooldowns.get(player.getUniqueId());
        if (now - time >= timer) {
            this.cooldowns.remove(player.getUniqueId());
            return false;
        }
        return true;
    }
}

public CooldownManager getCooldownManager() {
        return this.cooldownManager;
    }

    public void onLoad() {
        this.cooldownManager = new CooldownManager();
    }

    public CooldownManager cooldownManager;