Prepare codebase to adhere to Checkstyle rules

Issue gh-393

samples/httpsession/src/integration-test/groovy/sample/AttributeTests.groovy

@@ -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 geb.spock.*
@@ -42,4 +43,4 @@ class AttributeTests extends GebReportingSpec {
 		attributes[0].name == 'a'
 		attributes[0].value == 'b'
 	}
-}
+}

samples/httpsession/src/integration-test/groovy/sample/pages/HomePage.groovy

@@ -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.pages
 
 import geb.*

samples/httpsession/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;
@@ -28,4 +29,4 @@ public class Config {
 		return new JedisConnectionFactory(); // <2>
 	}
 }
-// end::class[]
+// end::class[]

samples/httpsession/src/main/java/sample/Initializer.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.session.web.context.AbstractHttpSessionApplicationInitializer;
@@ -25,4 +26,4 @@ public class Initializer
 		super(Config.class); // <2>
 	}
 }
-// end::class[]
+// end::class[]

samples/httpsession/src/main/java/sample/SessionServlet.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.
@@ -13,13 +13,17 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+
 package sample;
 
-import javax.servlet.*;
-import javax.servlet.annotation.*;
-import javax.servlet.http.*;
 import java.io.IOException;
 
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
 // tag::class[]
 @WebServlet("/session")
 public class SessionServlet extends HttpServlet {
@@ -34,4 +38,4 @@ public class SessionServlet extends HttpServlet {
 
 	private static final long serialVersionUID = 2878267318695777395L;
 }
-// tag::end[]
+// tag::end[]