fix must override a superclass method (#919)

* fix must override a superclass method

* fix must override a superclass method

abstract-factory/src/main/java/com/iluwatar/abstractfactory/ElfKingdomFactory.java

@@ -29,14 +29,17 @@ package com.iluwatar.abstractfactory;
  */
 public class ElfKingdomFactory implements KingdomFactory {
 
+  @Override
   public Castle createCastle() {
     return new ElfCastle();
   }
 
+  @Override
   public King createKing() {
     return new ElfKing();
   }
 
+  @Override
   public Army createArmy() {
     return new ElfArmy();
   }

abstract-factory/src/main/java/com/iluwatar/abstractfactory/OrcKingdomFactory.java

@@ -29,14 +29,17 @@ package com.iluwatar.abstractfactory;
  */
 public class OrcKingdomFactory implements KingdomFactory {
 
+  @Override
   public Castle createCastle() {
     return new OrcCastle();
   }
 
+  @Override
   public King createKing() {
     return new OrcKing();
   }
 
+  @Override
   public Army createArmy() {
     return new OrcArmy();
   }

acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/ConfigureForDosVisitor.java

@@ -33,10 +33,12 @@ public class ConfigureForDosVisitor implements AllModemVisitor {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(ConfigureForDosVisitor.class);
 
+  @Override
   public void visit(Hayes hayes) {
     LOGGER.info(hayes + " used with Dos configurator.");
   }
 
+  @Override
   public void visit(Zoom zoom) {
     LOGGER.info(zoom + " used with Dos configurator.");
   }

acyclic-visitor/src/main/java/com/iluwatar/acyclicvisitor/ConfigureForUnixVisitor.java

@@ -34,6 +34,7 @@ public class ConfigureForUnixVisitor implements ZoomVisitor {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(ConfigureForUnixVisitor.class);
 
+  @Override
   public void visit(Zoom zoom) {
     LOGGER.info(zoom + " used with Unix configurator.");
   }

factory-method/src/main/java/com/iluwatar/factory/method/ElfBlacksmith.java

@@ -29,6 +29,7 @@ package com.iluwatar.factory.method;
  */
 public class ElfBlacksmith implements Blacksmith {
 
+  @Override
   public Weapon manufactureWeapon(WeaponType weaponType) {
     return new ElfWeapon(weaponType);
   }

factory-method/src/main/java/com/iluwatar/factory/method/OrcBlacksmith.java

@@ -29,6 +29,7 @@ package com.iluwatar.factory.method;
  */
 public class OrcBlacksmith implements Blacksmith {
 
+  @Override
   public Weapon manufactureWeapon(WeaponType weaponType) {
     return new OrcWeapon(weaponType);
   }

throttling/src/main/java/com/iluwatar/throttling/timer/ThrottleTimerImpl.java

@@ -49,6 +49,7 @@ public class ThrottleTimerImpl implements Throttler {
    * A timer is initiated with this method. The timer runs every second and resets the
    * counter.
    */
+  @Override
   public void start() {
     new Timer(true).schedule(new TimerTask() {
       @Override