Kotlin -> Java (#586)

* Convert All Plugins To Java

* Convert Rest Of Kt To Java & Remove Kt From Maven

2006Scape Server/plugins/plugin/buttons/ButtonClick.java

@@ -0,0 +1,18 @@
+package plugin.buttons;
+
+import com.rs2.event.EventContext;
+import com.rs2.event.EventSubscriber;
+import com.rs2.event.impl.ButtonActionEvent;
+import com.rs2.game.players.Player;
+
+public abstract class ButtonClick implements EventSubscriber<ButtonActionEvent> {
+
+    @Override
+    public void subscribe(EventContext context, Player player, ButtonActionEvent event) {
+        execute(player, event);
+    }
+
+    protected abstract void execute(Player player, ButtonActionEvent event);
+
+    public abstract boolean test(ButtonActionEvent event);
+}