Fix checkstyle violations in samples

spring-boot-samples/spring-boot-sample-atmosphere/src/main/java/sample/atmosphere/SampleAtmosphereApplication.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2016 the original author or authors.
+ * Copyright 2012-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -59,6 +59,10 @@ public class SampleAtmosphereApplication {
 		return registration;
 	}
 
+	public static void main(String[] args) throws Exception {
+		SpringApplication.run(SampleAtmosphereApplication.class, args);
+	}
+
 	@Configuration
 	static class MvcConfiguration extends WebMvcConfigurerAdapter {
 
@@ -79,8 +83,4 @@ public class SampleAtmosphereApplication {
 
 	}
 
-	public static void main(String[] args) throws Exception {
-		SpringApplication.run(SampleAtmosphereApplication.class, args);
-	}
-
 }