Change error method signatures to reduce code verbosity

src/main/java/net/frozenorb/apiv3/util/ErrorUtils.java

@@ -8,21 +8,21 @@ import java.util.UUID;
 @UtilityClass
 public class ErrorUtils {
 
-    public static Document createResponse(Throwable throwable) {
+    public static String toResponseString(Throwable throwable) {
         // We do this identifier thing so we can easily search logs for the exception.
         // We can't send the stack trace to the user, so this is a good alternative.
         String identifier = UUID.randomUUID().toString();
         System.out.println("[Caught exception] Identifier=" + identifier);
         throwable.printStackTrace();
 
-        return createResponse(throwable.getClass().getSimpleName(), identifier);
+        return toResponseString(throwable.getClass().getSimpleName(), identifier);
     }
 
-    public static Document createResponse(String reason) {
-        return createResponse(reason, null);
+    public static String toResponseString(String reason) {
+        return toResponseString(reason, null);
     }
 
-    private static Document createResponse(String reason, String identifier) {
+    private static String toResponseString(String reason, String identifier) {
         Document json = new Document();
 
         json.put("failed", true);
@@ -32,7 +32,7 @@ public class ErrorUtils {
             json.put("identifier", identifier);
         }
 
-        return json;
+        return json.toJson();
     }
 
 }