minor formatting work

log-mdc/src/main/java/com/baeldung/mdc/TransactionFactory.java

@@ -7,15 +7,15 @@ import java.util.UUID;
 
 public class TransactionFactory {
 
-	private static final String[] NAMES = {"John", "Susan", "Marc", "Samantha"};
-	private static long nextId = 1;
-	
-	public Transfer newInstance() {
-		String transactionId = String.valueOf( nextId++ );
-		String owner = NAMES[ (int) floor(random()*NAMES.length) ];
-		long amount = (long) (random()*1500 + 500);
-		Transfer tx = new Transfer(transactionId, owner, amount);
-		return tx;
-	}
-	
+    private static final String[] NAMES = { "John", "Susan", "Marc", "Samantha" };
+    private static long nextId = 1;
+
+    public Transfer newInstance() {
+        String transactionId = String.valueOf(nextId++);
+        String owner = NAMES[(int) floor(random() * NAMES.length)];
+        long amount = (long) (random() * 1500 + 500);
+        Transfer tx = new Transfer(transactionId, owner, amount);
+        return tx;
+    }
+
 }

log-mdc/src/main/java/com/baeldung/mdc/TransferDemo.java

@@ -18,11 +18,11 @@ public class TransferDemo {
 
         for (int i = 0; i < 10; i++) {
             Transfer tx = transactionFactory.newInstance();
-            
-            //Runnable task = new Log4JRunnable(tx);
-            //Runnable task = new Log4J2Runnable(tx);
+
+            // Runnable task = new Log4JRunnable(tx);
+            // Runnable task = new Log4J2Runnable(tx);
             Runnable task = new Slf4jRunnable(tx);
-            
+
             executor.submit(task);
         }
 

log-mdc/src/main/java/com/baeldung/ndc/controller/JBossLoggingController.java

@@ -13,7 +13,6 @@ import org.springframework.web.bind.annotation.RestController;
 import com.baeldung.ndc.Investment;
 import com.baeldung.ndc.service.InvestmentService;
 
-
 @RestController
 public class JBossLoggingController {
     @Autowired