Use Spring Java Format Checkstyle

Closes gh-1113

samples/misc/hazelcast/src/main/java/sample/Initializer.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2014-2017 the original author or authors.
+ * Copyright 2014-2018 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.
@@ -78,14 +78,14 @@ public class Initializer implements ServletContextListener {
 			socket = new ServerSocket(0);
 			return socket.getLocalPort();
 		}
-		catch (IOException e) {
-			throw new RuntimeException(e);
+		catch (IOException ex) {
+			throw new RuntimeException(ex);
 		}
 		finally {
 			try {
 				socket.close();
 			}
-			catch (IOException e) {
+			catch (IOException ex) {
 			}
 		}
 	}