Checkstyle and jdk11 fix with spock

tests/samples-messaging-stream/src/main/java/com/example/BookDeleted.java

@@ -22,10 +22,12 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 
 @SuppressWarnings("serial")
 public class BookDeleted implements Serializable {
+
 	public final String bookName;
 
 	@JsonCreator(mode = JsonCreator.Mode.PROPERTIES)
 	public BookDeleted(String bookName) {
 		this.bookName = bookName;
 	}
+
 }

tests/samples-messaging-stream/src/main/java/com/example/BookListener.java

@@ -62,4 +62,5 @@ public class BookListener {
 	}
 
 	public AtomicBoolean bookSuccessfulyDeleted = new AtomicBoolean(false);
+
 }

tests/samples-messaging-stream/src/main/java/com/example/BookReturned.java

@@ -22,10 +22,12 @@ import com.fasterxml.jackson.annotation.JsonCreator;
 
 @SuppressWarnings("serial")
 public class BookReturned implements Serializable {
+
 	public final String bookName;
 
 	@JsonCreator(mode = JsonCreator.Mode.PROPERTIES)
 	BookReturned(String bookName) {
 		this.bookName = bookName;
 	}
+
 }

tests/samples-messaging-stream/src/main/java/com/example/BookService.java

@@ -40,7 +40,7 @@ public class BookService {
 	 * a possibility to "trigger" sending of a message to the given messageFrom server
 	 * side: will run the method and await upon receiving message on the output
 	 * messageFrom
-	 * 
+	 *
 	 * Method triggers sending a message to a source
 	 */
 	public void returnBook(BookReturned bookReturned) {
@@ -48,4 +48,5 @@ public class BookService {
 		this.source.output().send(MessageBuilder.withPayload(bookReturned)
 				.setHeader("BOOK-NAME", bookReturned.bookName).build());
 	}
+
 }

tests/samples-messaging-stream/src/main/java/com/example/DeleteSink.java

@@ -29,4 +29,5 @@ interface DeleteSink extends Sink {
 
 	@Input(DeleteSink.INPUT)
 	SubscribableChannel delete();
+
 }

tests/samples-messaging-stream/src/main/java/com/example/StreamMessagingApplication.java

@@ -23,10 +23,11 @@ import org.springframework.cloud.stream.messaging.Sink;
 import org.springframework.cloud.stream.messaging.Source;
 
 @SpringBootApplication
-@EnableBinding({Source.class, Sink.class})
+@EnableBinding({ Source.class, Sink.class })
 class StreamMessagingApplication {
 
 	public static void main(String[] args) {
 		SpringApplication.run(StreamMessagingApplication.class, args);
 	}
+
 }