Add @SuppressWarnings("unused") to listeners.

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/ChunkListener.java

@@ -32,6 +32,7 @@ import java.util.HashSet;
 
 import static com.github.intellectualsites.plotsquared.plot.util.ReflectionUtils.getRefClass;
 
+@SuppressWarnings("unused")
 public class ChunkListener implements Listener {
 
     private RefMethod methodGetHandleChunk;

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/EntityPortal_1_7_9.java

@@ -18,6 +18,7 @@ import org.bukkit.plugin.Plugin;
 
 import java.util.List;
 
+@SuppressWarnings("unused")
 public class EntityPortal_1_7_9 implements Listener {
     private static boolean ignoreTP = false;
 

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/EntitySpawnListener.java

@@ -16,6 +16,7 @@ import org.bukkit.event.entity.EntitySpawnEvent;
 import org.bukkit.metadata.FixedMetadataValue;
 import org.bukkit.plugin.Plugin;
 
+@SuppressWarnings("unused")
 public class EntitySpawnListener implements Listener {
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
     public void creatureSpawnEvent(EntitySpawnEvent event) {

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/ForceFieldListener.java

@@ -16,6 +16,7 @@ import java.util.HashSet;
 import java.util.Set;
 import java.util.UUID;
 
+@SuppressWarnings("unused")
 public class ForceFieldListener {
 
     private static Set<PlotPlayer> getNearbyPlayers(Player player, Plot plot) {

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlayerEvents.java

@@ -56,6 +56,7 @@ import java.util.regex.Pattern;
 /**
  * Player Events involving plots.
  */
+@SuppressWarnings("unused")
 public class PlayerEvents extends PlotListener implements Listener {
 
     private boolean pistonBlocks = true;

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlayerEvents183.java

@@ -14,7 +14,9 @@ import org.bukkit.event.block.BlockExplodeEvent;
 
 import java.util.Iterator;
 
+@SuppressWarnings("unused")
 public class PlayerEvents183 implements Listener {
+
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
     public void onBigBoom(BlockExplodeEvent event) {
         Block block = event.getBlock();
@@ -38,12 +40,7 @@ public class PlayerEvents183 implements Listener {
         if (plot == null || !plot.getFlag(Flags.EXPLOSION).or(false)) {
             event.setCancelled(true);
         }
-        Iterator<Block> iterator = event.blockList().iterator();
-        while (iterator.hasNext()) {
-            Block b = iterator.next();
-            if (!plot.equals(area.getOwnedPlot(BukkitUtil.getLocation(b.getLocation())))) {
-                iterator.remove();
-            }
-        }
+        event.blockList().removeIf(
+            b -> !plot.equals(area.getOwnedPlot(BukkitUtil.getLocation(b.getLocation()))));
     }
 }

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlayerEvents_1_8.java

@@ -32,6 +32,7 @@ import java.util.HashSet;
 import java.util.List;
 import java.util.UUID;
 
+@SuppressWarnings("unused")
 public class PlayerEvents_1_8 extends PlotListener implements Listener {
 
     @SuppressWarnings("deprecation")

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlayerEvents_1_9.java

@@ -9,6 +9,7 @@ import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.entity.LingeringPotionSplashEvent;
 
+@SuppressWarnings("unused")
 public class PlayerEvents_1_9 implements Listener {
 
     private final PlayerEvents parent;

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlotPlusListener.java

@@ -28,6 +28,7 @@ import java.util.Iterator;
 import java.util.Map.Entry;
 import java.util.UUID;
 
+@SuppressWarnings("unused")
 public class PlotPlusListener extends PlotListener implements Listener {
 
     private static final HashMap<String, Interval> feedRunnable = new HashMap<>();

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlotPlusListener_1_12.java

@@ -12,7 +12,9 @@ import org.bukkit.event.entity.EntityPickupItemEvent;
 
 import java.util.UUID;
 
+@SuppressWarnings("unused")
 public class PlotPlusListener_1_12 implements Listener {
+
     @EventHandler public void onItemPickup(EntityPickupItemEvent event) {
         LivingEntity ent = event.getEntity();
         if (ent instanceof Player) {

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/PlotPlusListener_Legacy.java

@@ -11,7 +11,9 @@ import org.bukkit.event.player.PlayerPickupItemEvent;
 
 import java.util.UUID;
 
+@SuppressWarnings("unused")
 public class PlotPlusListener_Legacy implements Listener {
+    
     @EventHandler public void onItemPickup(PlayerPickupItemEvent event) {
         Player player = event.getPlayer();
         PlotPlayer pp = BukkitUtil.getPlayer(player);

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/SingleWorldListener.java

@@ -19,6 +19,7 @@ import java.lang.reflect.Method;
 
 import static com.github.intellectualsites.plotsquared.plot.util.ReflectionUtils.getRefClass;
 
+@SuppressWarnings("unused")
 public class SingleWorldListener implements Listener {
 
     private Method methodGetHandleChunk;

Bukkit/src/main/java/com/github/intellectualsites/plotsquared/bukkit/listeners/WorldEvents.java

@@ -12,7 +12,7 @@ import org.bukkit.event.Listener;
 import org.bukkit.event.world.WorldInitEvent;
 import org.bukkit.generator.ChunkGenerator;
 
-public class WorldEvents implements Listener {
+@SuppressWarnings("unused") public class WorldEvents implements Listener {
 
     @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
     public void onWorldInit(WorldInitEvent event) {

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/listeners/PlayerEvents.java

@@ -36,6 +36,7 @@ import java.util.*;
 import java.util.Map.Entry;
 import java.util.regex.Pattern;
 
+@SuppressWarnings("unused")
 public class PlayerEvents extends PlotListener implements Listener {
 
     private boolean pistonBlocks = true;

Nukkit/src/main/java/com/github/intellectualsites/plotsquared/nukkit/listeners/WorldEvents.java

@@ -14,6 +14,7 @@ import com.github.intellectualsites.plotsquared.plot.object.PlotArea;
 
 import java.util.HashMap;
 
+@SuppressWarnings("unused")
 public class WorldEvents implements Listener {
 
     public WorldEvents() {