Fix checkstyle rule

spring-boot-samples/spring-boot-sample-oauth2-resource-server/src/test/java/sample/oauth2/resource/SampleOauth2ResourceServerApplicationTests.java

@@ -108,4 +108,4 @@ public class SampleOauth2ResourceServerApplicationTests {
 				.setResponseCode(200).setBody(body);
 	}
 
-}
\ No newline at end of file
+}