Resolves checkstyle errors for api-gateway, lazy-loading, leader-election (#1066)

* Reduces checkstyle errors in lazy-loading

* Reduces checkstyle errors in leader-election

* Reduces checkstyle errors in api-gateway

lazy-loading/src/main/java/com/iluwatar/lazy/loading/HolderThreadSafe.java

@@ -27,10 +27,8 @@ import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
 /**
- * 
  * Same as HolderNaive but with added synchronization. This implementation is thread safe, but each
  * {@link #getHeavy()} call costs additional synchronization overhead.
- *
  */
 public class HolderThreadSafe {
 
@@ -39,14 +37,14 @@ public class HolderThreadSafe {
   private Heavy heavy;
 
   /**
-   * Constructor
+   * Constructor.
    */
   public HolderThreadSafe() {
     LOGGER.info("HolderThreadSafe created");
   }
 
   /**
-   * Get heavy object
+   * Get heavy object.
    */
   public synchronized Heavy getHeavy() {
     if (heavy == null) {