Misc improvements

Author: Nilanchal Panigrahy

004-spring-dependency-injection/naive-method/src/com/example/app/service/EmailService.java

@@ -3,6 +3,6 @@
 public class EmailService {
 
     public void emailUser(String subject, String toEmail, String template) {
-        //Send email here
+        //Send email over SMTP here
     }
 }

004-spring-dependency-injection/naive-method/src/com/example/app/service/ShoppingCartService.java

@@ -12,6 +12,10 @@ public ShoppingCartService() {
     }
 
     public void checkout(Product product, User user) {
+        //Logic to check out the product
+
+        //Payment verification
+
         emailService.emailUser("Order placed successfully for " + product.getName(),
                 user.getEmail(),
                 "test-email-template.html");

004-spring-dependency-injection/naive-method/src/com/example/app/service/UserService.java

@@ -4,12 +4,12 @@
 
 public class UserService {
 
-    private final EmailService emailService;
     private final UserDao userDao;
+    private final EmailService emailService;
 
     public UserService() {
-        emailService = new EmailService();
         userDao = new UserDao();
+        emailService = new EmailService();
     }
 
     public void registerUser(User user) {