Fixed bug with saving to flat file.

Must remember to include blank constructor so Beans can create the
object!

src/bskyblock/addon/warps/database/object/WarpsData.java

@@ -16,7 +16,9 @@ public class WarpsData implements DataObject {
     @Expose
     private String uniqueId = "warps";
     @Expose
-    private Map<Location, UUID> warpSigns = new HashMap<>(); 
+    private Map<Location, UUID> warpSigns = new HashMap<>();
+    
+    public WarpsData() {}
 
     @Override
     public String getUniqueId() {