Add UserEntity, modify DemoApplication

src/main/java/Domain/UserEntity.java

@@ -0,0 +1,4 @@
+package Domain;
+
+public class UserEntity {
+}

src/main/java/com/example/demo/DemoApplication.java

@@ -8,6 +8,7 @@ public class DemoApplication {
 
 	public static void main(String[] args) {
 		System.out.println("Start application");
+		System.out.println("Aplication running");
 		SpringApplication.run(DemoApplication.class, args);
 	}