Fix build failure.
diff --git a/juneau-examples/juneau-examples-rest/src/main/java/org/apache/juneau/examples/rest/HelloWorldResource.java b/juneau-examples/juneau-examples-rest/src/main/java/org/apache/juneau/examples/rest/HelloWorldResource.java
index 86463c1..82ad529 100644
--- a/juneau-examples/juneau-examples-rest/src/main/java/org/apache/juneau/examples/rest/HelloWorldResource.java
+++ b/juneau-examples/juneau-examples-rest/src/main/java/org/apache/juneau/examples/rest/HelloWorldResource.java
@@ -55,4 +55,7 @@
 	public Swagger getOptions(RestRequest req) {

 		return req.getSwagger();

 	}

+

+	@Override

+	public void error() {}

 }