Fix checkstyle violations in samples

spring-boot-samples/spring-boot-sample-parent-context/src/main/java/sample/parent/SampleParentContextApplication.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.
@@ -36,6 +36,11 @@ import org.springframework.integration.file.FileWritingMessageHandler;
 @EnableConfigurationProperties(ServiceProperties.class)
 public class SampleParentContextApplication {
 
+	public static void main(String[] args) throws Exception {
+		new SpringApplicationBuilder(Parent.class)
+				.child(SampleParentContextApplication.class).run(args);
+	}
+
 	@EnableAutoConfiguration
 	protected static class Parent {
 
@@ -83,9 +88,4 @@ public class SampleParentContextApplication {
 
 	}
 
-	public static void main(String[] args) throws Exception {
-		new SpringApplicationBuilder(Parent.class)
-				.child(SampleParentContextApplication.class).run(args);
-	}
-
 }