Resolves checkstyle errors for callback, chain, circuit-breaker (#1060)

* Reduces checkstyle errors in callback

* Reduces checkstyle errors in chain

* Reduces checkstyle errors in circuit-breaker

callback/src/main/java/com/iluwatar/callback/App.java

@@ -23,16 +23,14 @@
 
 package com.iluwatar.callback;
 
-import org.slf4j.Logger;
-
 import static org.slf4j.LoggerFactory.getLogger;
 
+import org.slf4j.Logger;
+
 /**
- *
- * Callback pattern is more native for functional languages where functions are
- * treated as first-class citizens. Prior to Java 8 callbacks can be simulated
- * using simple (alike command) interfaces.
- *
+ * Callback pattern is more native for functional languages where functions are treated as
+ * first-class citizens. Prior to Java 8 callbacks can be simulated using simple (alike command)
+ * interfaces.
  */
 public final class App {
 
@@ -42,7 +40,7 @@ public final class App {
   }
 
   /**
-   * Program entry point
+   * Program entry point.
    */
   public static void main(final String[] args) {
     Task task = new SimpleTask();

callback/src/main/java/com/iluwatar/callback/Callback.java

@@ -24,9 +24,7 @@
 package com.iluwatar.callback;
 
 /**
- *
- * Callback interface
- *
+ * Callback interface.
  */
 public interface Callback {
 

callback/src/main/java/com/iluwatar/callback/LambdasApp.java

@@ -23,24 +23,23 @@
 
 package com.iluwatar.callback;
 
-import org.slf4j.Logger;
-
 import static org.slf4j.LoggerFactory.getLogger;
 
+import org.slf4j.Logger;
+
 /**
- *
- * This example generates the exact same output as {@link App} however the
- * callback has been defined as a Lambdas expression.
- *
+ * This example generates the exact same output as {@link App} however the callback has been defined
+ * as a Lambdas expression.
  */
 public final class LambdasApp {
 
   private static final Logger LOGGER = getLogger(LambdasApp.class);
 
-  private LambdasApp() { }
+  private LambdasApp() {
+  }
 
   /**
-   * Program entry point
+   * Program entry point.
    */
   public static void main(final String[] args) {
     Task task = new SimpleTask();

callback/src/main/java/com/iluwatar/callback/SimpleTask.java

@@ -23,14 +23,12 @@
 
 package com.iluwatar.callback;
 
-import org.slf4j.Logger;
-
 import static org.slf4j.LoggerFactory.getLogger;
 
+import org.slf4j.Logger;
+
 /**
- *
- * Implementation of task that need to be executed
- *
+ * Implementation of task that need to be executed.
  */
 public final class SimpleTask extends Task {
 
@@ -39,6 +37,6 @@ public final class SimpleTask extends Task {
   @Override
   public void execute() {
     LOGGER.info("Perform some important activity and after call the"
-            + " callback method.");
+        + " callback method.");
   }
 }

callback/src/main/java/com/iluwatar/callback/Task.java

@@ -24,14 +24,12 @@
 package com.iluwatar.callback;
 
 /**
- *
- * Template-method class for callback hook execution
- *
+ * Template-method class for callback hook execution.
  */
 public abstract class Task {
 
   /**
-   * Execute with callback
+   * Execute with callback.
    */
   final void executeWith(final Callback callback) {
     execute();