Finished r1_21 implementation.

- Better NodeHandler evaluation.

src/main/java/io/github/adrianvic/nemesiseye/Events.java

@@ -0,0 +1,25 @@
+package io.github.adrianvic.nemesiseye;
+
+import org.bukkit.entity.HumanEntity;
+import org.bukkit.entity.Player;
+import org.bukkit.event.block.BlockBreakEvent;
+import org.bukkit.event.entity.EntityDamageByEntityEvent;
+import org.bukkit.event.player.PlayerInteractEvent;
+
+public class Events {
+    public static void onBlockBreak(BlockBreakEvent event) {
+        event.setCancelled(!Validator.canBreak(event.getPlayer()));
+    }
+
+    public static void onInteractionEvent(PlayerInteractEvent event) {
+        if (event.getItem() != null) {
+            event.setCancelled(!Validator.canInteract(event.getPlayer()));
+        }
+    }
+
+    public static void onEntityDamageByEntityEvent(EntityDamageByEntityEvent event) {
+        if (event.getDamager() instanceof Player) {
+            event.setCancelled(!Validator.canHit((HumanEntity) event.getDamager()));
+        }
+    }
+}