Prepare codebase to adhere to Checkstyle rules

Issue gh-393

samples/security/src/main/java/sample/Config.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2015 the original author or authors.
+ * Copyright 2014-2016 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.
@@ -13,6 +13,7 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package sample;
 
 import org.springframework.context.annotation.Bean;
@@ -30,4 +31,4 @@ public class Config {
 		return new JedisConnectionFactory(); // <2>
 	}
 }
-// end::class[]
+// end::class[]