Turned on checkstyle

spring-cloud-function-samples/function-sample-pof/src/main/java/functions/Greeter.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2017 the original author or authors.
+ * Copyright 2012-2019 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.
@@ -18,9 +18,12 @@ package functions;
 
 import java.util.function.Function;
 
+// @checkstyle:off
 public class Greeter implements Function<String, String> {
 
 	public String apply(String name) {
 		return "Hello " + name;
 	}
+
 }
+// @checkstyle:on