Adjust checkstyle rules. Make checkstyle fail the build when violations are found. Correct all current checkstyle violations.

monostate/src/main/java/com/iluwatar/monostate/LoadBalancer.java

@@ -24,6 +24,9 @@ public class LoadBalancer {
     servers.add(new Server("localhost", 8084, ++id));
   }
 
+  /**
+   * Add new server
+   */
   public final void addServer(Server server) {
     synchronized (servers) {
       servers.add(server);
@@ -39,6 +42,9 @@ public class LoadBalancer {
     return lastServedId;
   }
 
+  /**
+   * Handle request
+   */
   public void serverequest(Request request) {
     if (lastServedId >= servers.size()) {
       lastServedId = 0;

monostate/src/main/java/com/iluwatar/monostate/Server.java

@@ -11,6 +11,9 @@ public class Server {
   public final int port;
   public final int id;
 
+  /**
+   * Constructor
+   */
   public Server(String host, int port, int id) {
     this.host = host;
     this.port = port;