feat(dao): add initial data access object templates

src/main/java/dev/Main.java

@@ -0,0 +1,14 @@
+package dev;
+
+import dev.ui.ConsoleMenu;
+
+public class Main {
+
+    public static void main(String[] args) {
+
+        ConsoleMenu menu = new ConsoleMenu();
+        menu.start();
+
+    }
+
+}

src/main/java/dev/dao/MenuItemDao.java

@@ -0,0 +1,25 @@
+package dev.dao;
+
+import dev.model.MenuItem;
+
+import java.util.List;
+
+public class MenuItemDao {
+
+    public List<MenuItem> findAll() {
+
+        // TODO:
+        // Retrieve all menu items
+
+        return null;
+    }
+
+    public MenuItem findById(int id) {
+
+        // TODO:
+        // Find menu item by id
+
+        return null;
+    }
+
+}

src/main/java/dev/dao/OrderDao.java

@@ -0,0 +1,25 @@
+package dev.dao;
+
+import dev.model.Order;
+
+import java.util.List;
+
+public class OrderDao {
+
+    public int save(Order order) {
+
+        // TODO:
+        // Insert order and return generated id
+
+        return -1;
+    }
+
+    public List<Order> findByUserId(int userId) {
+
+        // TODO:
+        // Retrieve all orders of a user
+
+        return null;
+    }
+
+}

src/main/java/dev/dao/OrderDetailDao.java

@@ -0,0 +1,24 @@
+package dev.dao;
+
+import dev.model.OrderDetail;
+
+import java.util.List;
+
+public class OrderDetailDao {
+
+    public void save(OrderDetail detail) {
+
+        // TODO:
+        // Insert order detail
+
+    }
+
+    public List<OrderDetail> findByOrderId(int orderId) {
+
+        // TODO:
+        // Retrieve order details
+
+        return null;
+    }
+
+}

src/main/java/dev/dao/UserDao.java

@@ -0,0 +1,23 @@
+package dev.dao;
+
+import dev.model.User;
+
+public class UserDao {
+
+    public boolean save(User user) {
+
+        // TODO:
+        // Insert user into database
+
+        return false;
+    }
+
+    public User findByUsername(String username) {
+
+        // TODO:
+        // Find a user by username
+
+        return null;
+    }
+
+}