Started ripping apart the (bigger) player listener class.

src/net/jitse/npclib/listeners/PlayerListener.java

@@ -12,7 +12,6 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerMoveEvent;
-import org.bukkit.event.player.PlayerQuitEvent;
 import org.bukkit.event.player.PlayerTeleportEvent;
 
 /**
@@ -20,20 +19,6 @@ import org.bukkit.event.player.PlayerTeleportEvent;
  */
 public class PlayerListener implements Listener {
 
-    @EventHandler
-    public void onPlayerQuit(PlayerQuitEvent event) {
-        Player player = event.getPlayer();
-        for (NPC npc : NPCManager.getAllNPCs()) {
-            if (npc.getAutoHidden().contains(player.getUniqueId())) {
-                npc.getAutoHidden().remove(player.getUniqueId());
-            }
-
-            if (npc.isActuallyShown(player)) {
-                npc.hide(player);
-            }
-        }
-    }
-
     @EventHandler
     public void onPlayerMove(PlayerMoveEvent event) {
         Location from = event.getFrom();

src/net/jitse/npclib/listeners/player/PlayerQuitListener.java

@@ -0,0 +1,32 @@
+/*
+ * Copyright (c) 2018 Jitse Boonstra
+ */
+
+package net.jitse.npclib.listeners.player;
+
+import net.jitse.npclib.NPCManager;
+import net.jitse.npclib.api.NPC;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerQuitEvent;
+
+/**
+ * @author Jitse Boonstra
+ */
+public class PlayerQuitListener implements Listener {
+
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent event) {
+        Player player = event.getPlayer();
+        for (NPC npc : NPCManager.getAllNPCs()) {
+            if (npc.getAutoHidden().contains(player.getUniqueId())) {
+                npc.getAutoHidden().remove(player.getUniqueId());
+            }
+
+            if (npc.isActuallyShown(player)) {
+                npc.hide(player);
+            }
+        }
+    }
+}