Add debug for closing inventories on shutdown for #113.

src/main/java/com/drtshock/playervaults/PlayerVaults.java

@@ -126,9 +126,9 @@ public class PlayerVaults extends JavaPlugin {
                 }
 
                 this.inVault.remove(player.getName());
+                debug("Closing vault for " + player.getName());
+                player.closeInventory();
             }
-
-            player.closeInventory();
         }
 
         if (getConfig().getBoolean("cleanup.enable", false)) {
@@ -381,4 +381,10 @@ public class PlayerVaults extends JavaPlugin {
             Bukkit.getLogger().log(Level.INFO, "At {0}. Time since start: {1}ms", new Object[]{s, (System.currentTimeMillis() - start)});
         }
     }
+
+    public static void debug(String s) {
+        if (DEBUG) {
+            Bukkit.getLogger().log(Level.INFO, s);
+        }
+    }
 }