diff --git a/exercises/practice/two-bucket/.meta/config.json b/exercises/practice/two-bucket/.meta/config.json
index d1863f52f..4f45ff4a4 100644
--- a/exercises/practice/two-bucket/.meta/config.json
+++ b/exercises/practice/two-bucket/.meta/config.json
@@ -19,14 +19,16 @@
   "files": {
     "solution": [
       "src/main/java/TwoBucket.java",
-      "src/main/java/Result.java"
+      "src/main/java/Result.java",
+      "src/main/java/UnreachableGoalException.java"
     ],
     "test": [
       "src/test/java/TwoBucketTest.java"
     ],
     "example": [
       ".meta/src/reference/java/TwoBucket.java",
-      ".meta/src/reference/java/Result.java"
+      ".meta/src/reference/java/Result.java",
+      ".meta/src/reference/java/UnreachableGoalException.java"
     ],
     "invalidator": [
       "build.gradle"
diff --git a/exercises/practice/two-bucket/.meta/src/reference/java/TwoBucket.java b/exercises/practice/two-bucket/.meta/src/reference/java/TwoBucket.java
index 457365340..9d8d18e1e 100644
--- a/exercises/practice/two-bucket/.meta/src/reference/java/TwoBucket.java
+++ b/exercises/practice/two-bucket/.meta/src/reference/java/TwoBucket.java
@@ -3,6 +3,7 @@
 import java.util.Map;
 
 final class TwoBucket {
+    
     private int totalMoves = Integer.MAX_VALUE;
     private String finalBucket = "";
     private int otherBucket = Integer.MAX_VALUE;