Resolves checkstyle errors for remaining m (#1090)

* Reduces checkstyle errors in marker

* Reduces checkstyle errors in master-worker-pattern

* Reduces checkstyle errors in mediator

* Reduces checkstyle errors in memento

* Reduces checkstyle errors in model-view-controller

* Reduces checkstyle errors in model-view-presenter

* Reduces checkstyle errors in module

* Reduces checkstyle errors in monad

* Reduces checkstyle errors in monostate

* Reduces checkstyle errors in multiton

* Reduces checkstyle errors in mute-idiom

* Reduces checkstyle errors in mutex

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

@@ -23,36 +23,33 @@
 
 package com.iluwatar.memento;
 
+import java.util.Stack;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.util.Stack;
-
 /**
- * 
  * The Memento pattern is a software design pattern that provides the ability to restore an object
  * to its previous state (undo via rollback).
- * <p>
- * The Memento pattern is implemented with three objects: the originator, a caretaker and a memento.
- * The originator is some object that has an internal state. The caretaker is going to do something
- * to the originator, but wants to be able to undo the change. The caretaker first asks the
- * originator for a memento object. Then it does whatever operation (or sequence of operations) it
- * was going to do. To roll back to the state before the operations, it returns the memento object
- * to the originator. The memento object itself is an opaque object (one which the caretaker cannot,
- * or should not, change). When using this pattern, care should be taken if the originator may
- * change other objects or resources - the memento pattern operates on a single object.
- * <p>
- * In this example the object ({@link Star}) gives out a "memento" ({@link StarMemento}) that
+ *
+ * <p>The Memento pattern is implemented with three objects: the originator, a caretaker and a
+ * memento. The originator is some object that has an internal state. The caretaker is going to do
+ * something to the originator, but wants to be able to undo the change. The caretaker first asks
+ * the originator for a memento object. Then it does whatever operation (or sequence of operations)
+ * it was going to do. To roll back to the state before the operations, it returns the memento
+ * object to the originator. The memento object itself is an opaque object (one which the caretaker
+ * cannot, or should not, change). When using this pattern, care should be taken if the originator
+ * may change other objects or resources - the memento pattern operates on a single object.
+ *
+ * <p>In this example the object ({@link Star}) gives out a "memento" ({@link StarMemento}) that
  * contains the state of the object. Later on the memento can be set back to the object restoring
  * the state.
- * 
  */
 public class App {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(App.class);
 
   /**
-   * Program entry point
+   * Program entry point.
    */
   public static void main(String[] args) {
     Stack<StarMemento> states = new Stack<>();

memento/src/main/java/com/iluwatar/memento/Star.java

@@ -24,9 +24,7 @@
 package com.iluwatar.memento;
 
 /**
- * 
  * Star uses "mementos" to store and restore state.
- * 
  */
 public class Star {
 
@@ -35,7 +33,7 @@ public class Star {
   private int massTons;
 
   /**
-   * Constructor
+   * Constructor.
    */
   public Star(StarType startType, int startAge, int startMass) {
     this.type = startType;
@@ -44,7 +42,7 @@ public class Star {
   }
 
   /**
-   * Makes time pass for the star
+   * Makes time pass for the star.
    */
   public void timePasses() {
     ageYears *= 2;
@@ -96,9 +94,7 @@ public class Star {
   }
 
   /**
-   * 
-   * StarMemento implementation
-   * 
+   * StarMemento implementation.
    */
   private static class StarMementoInternal implements StarMemento {
 

memento/src/main/java/com/iluwatar/memento/StarMemento.java

@@ -24,9 +24,7 @@
 package com.iluwatar.memento;
 
 /**
- * 
  * External interface to memento.
- * 
  */
 public interface StarMemento {
 

memento/src/main/java/com/iluwatar/memento/StarType.java

@@ -24,9 +24,7 @@
 package com.iluwatar.memento;
 
 /**
- * 
- * StarType enumeration
- *
+ * StarType enumeration.
  */
 public enum StarType {