Resolves checkstyle errors for guarded-suspension, half-sync-half-async, hexagonal (#1064)

* Reduces checkstyle errors in guarded-suspension

* Reduces checkstyle errors in half-sync-half-async

* Reduces checkstyle errors in hexagonal

half-sync-half-async/src/main/java/com/iluwatar/halfsynchalfasync/AsynchronousService.java

@@ -23,15 +23,14 @@
 
 package com.iluwatar.halfsynchalfasync;
 
-import org.slf4j.Logger;
-import org.slf4j.LoggerFactory;
-
 import java.util.concurrent.BlockingQueue;
 import java.util.concurrent.ExecutionException;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.FutureTask;
 import java.util.concurrent.ThreadPoolExecutor;
 import java.util.concurrent.TimeUnit;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 
 /**
  * This is the asynchronous layer which does not block when a new request arrives. It just passes
@@ -63,13 +62,14 @@ public class AsynchronousService {
 
   /**
    * A non-blocking method which performs the task provided in background and returns immediately.
-   * <p>
-   * On successful completion of task the result is posted back using callback method
-   * {@link AsyncTask#onPostCall(Object)}, if task execution is unable to complete normally due to
-   * some exception then the reason for error is posted back using callback method
-   * {@link AsyncTask#onError(Throwable)}.
-   * <p>
-   * NOTE: The results are posted back in the context of background thread in this implementation.
+   *
+   * <p>On successful completion of task the result is posted back using callback method {@link
+   * AsyncTask#onPostCall(Object)}, if task execution is unable to complete normally due to some
+   * exception then the reason for error is posted back using callback method {@link
+   * AsyncTask#onError(Throwable)}.
+   *
+   * <p>NOTE: The results are posted back in the context of background thread in this
+   * implementation.
    */
   public <T> void execute(final AsyncTask<T> task) {
     try {