Metadata doesn't work, help me!

Hello guys, this is my first post here on the forum, so I have a code where I type a command:
( /tnt 1 1 player 1 ), and I get a tnt with lore, and metadata. So far so good, the problem starts here:

Code:

@EventHandler
    fun boostTnt (e: EntityExplodeEvent) {
        Bukkit.broadcastMessage("Algo explodindo no mundo...") //Just for debug.
        val entityTypeEvent = e.entityType
        if (e.entity.hasMetadata(TNTBOOST)) {
            Bukkit.broadcastMessage("Tnt Capturada...") //Just for debug
            e.isCancelled = true
            e.entity.removeMetadata(TNTBOOST, plugin)
        }
    }

Code:

 if (e.entity.hasMetadata(TNTBOOST))

In this line I check if that entity has Metadata, however I notice that there is an error in this line, because when I run the plugin it does not perform any action within that if. Well, obviously I'm doing something wrong ... So keep my code:

EVENTS:

Code:

class EventMaster : Listener{
    private var plugin: JavaPlugin? = null

    val TNTBOOST = "tntboost"

    @EventHandler
    fun boostTnt (e: EntityExplodeEvent) {
        Bukkit.broadcastMessage("Algo explodindo no mundo...") //Just for debug.
        val entityTypeEvent = e.entityType
        if (e.entity.hasMetadata(TNTBOOST)) {
            Bukkit.broadcastMessage("Tnt Capturada...") //Just for debug
            e.isCancelled = true
            e.entity.removeMetadata(TNTBOOST, plugin)
        }
    }

    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
    fun boostTntSetData (e: BlockPlaceEvent) {
        try {
            val itemPlayerHand: ItemStack = e.player.itemInHand
            if (itemPlayerHand.itemMeta.displayName != null) {
                if (itemPlayerHand.itemMeta.displayName == "Tnt de impulssão!") {
                    e.blockPlaced.setMetadata(TNTBOOST, FixedMetadataValue(plugin, "boostTnt"))
                }
            }
        } catch (e: Exception) {}
    }
}

Commands:

Code:

class CommandsMaster : CommandExecutor{
    var boostTntLore = listOf("Uma incrivel tnt de impulssão ( ELA NÃO DESTROI BLOCOS ), com essa amiguinha torne seus canhões POTENTES!!")
    override fun onCommand(sender: CommandSender?, comando: Command?, label: String?, args: Array<out String>?): Boolean {

        if (sender !is Player) {
            if (sender != null) {
                sender.sendMessage("Comando indisponivel no console.")
            }
        }

        if (comando != null) {
            if (comando.name.equals("tnt", ignoreCase = true)) {
                if (args?.size == 1) {
                    sender?.sendMessage("Favor utilize: /tnt <tipo> <player> <quantidade>")
                } else if (args?.size == 2) {
                    sender?.sendMessage("Favor utilize: /tnt <tipo> <player> <quantidade>")
                } else if (args?.size == 3) {
                    sender?.sendMessage("Favor utilize: /tnt <tipo> <player> <quantidade>")
                } else if (args?.size == 4) {
                    val playerName: String = args[2]
                    val target: Player? = sender?.server?.getPlayerExact(playerName)
                    if (target == null) {
                        sender?.sendMessage("O jogador esta offline ou não existe.")
                        return true
                    }

                    var boostTnt: ItemStack = ItemStack(Material.TNT)
                    boostTnt.addUnsafeEnchantment(Enchantment.DURABILITY, 2)
                    var boostTntMeta: ItemMeta = boostTnt.itemMeta
                    boostTntMeta.displayName = "Tnt de impulssão!"
                    boostTntMeta.lore = boostTntLore
                    boostTnt.setItemMeta(boostTntMeta)
                    target.inventory.addItem(boostTnt)

                }
            }
        }
        return true
    }
}