added solution:

pom.xml

@@ -31,6 +31,12 @@
             <version>4.0.1</version>
             <scope>provided</scope>
         </dependency>
+        <dependency>
+            <groupId>jstl</groupId>
+            <artifactId>jstl</artifactId>
+            <version>1.2</version>
+        </dependency>
+
     </dependencies>
 
     <build>

src/main/java/mate/controller/AddDriverToCarController.java

@@ -0,0 +1,35 @@
+package mate.controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.model.Car;
+import mate.model.Driver;
+import mate.service.CarService;
+import mate.service.DriverService;
+
+@WebServlet("/cars/drivers/add")
+public class AddDriverToCarController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final CarService carService = (CarService) injector.getInstance(CarService.class);
+    private final DriverService driverService =
+            (DriverService) injector.getInstance(DriverService.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        req.getRequestDispatcher("/WEB-INF/views/addingDriverToCar.jsp").forward(req, resp);
+    }
+
+    public void doPost(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        Car car = carService.get(Long.valueOf(req.getParameter("carId")));
+        Driver driver = driverService.get(Long.valueOf(req.getParameter("driverId")));
+        carService.addDriverToCar(driver, car);
+        resp.sendRedirect(req.getContextPath() + "/index");
+    }
+}

src/main/java/mate/controller/CreateCarController.java

@@ -0,0 +1,39 @@
+package mate.controller;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.model.Car;
+import mate.service.CarService;
+import mate.service.ManufacturerService;
+
+@WebServlet("/cars/add")
+public class CreateCarController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final ManufacturerService manufacturerService =
+            (ManufacturerService) injector.getInstance(ManufacturerService.class);
+    private final CarService carService = (CarService) injector.getInstance(CarService.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        req.getRequestDispatcher("/WEB-INF/views/carCreation.jsp").forward(req, resp);
+    }
+
+    @Override
+    public void doPost(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        Car car = new Car();
+        car.setModel(req.getParameter("model"));
+        car.setManufacturer(manufacturerService.get(
+                Long.valueOf(req.getParameter("manufacturerId"))));
+        car.setDrivers(new ArrayList<>());
+        carService.create(car);
+        resp.sendRedirect(req.getContextPath() + "/cars");
+    }
+}

src/main/java/mate/controller/CreateDriverController.java

@@ -0,0 +1,34 @@
+package mate.controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.model.Driver;
+import mate.service.DriverService;
+
+@WebServlet("/drivers/add")
+public class CreateDriverController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final DriverService driverService =
+            (DriverService) injector.getInstance(DriverService.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        req.getRequestDispatcher("/WEB-INF/views/driverCreation.jsp").forward(req, resp);
+    }
+
+    @Override
+    public void doPost(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        Driver driver = new Driver();
+        driver.setName(req.getParameter("name"));
+        driver.setLicenseNumber(req.getParameter("licenseNumber"));
+        driverService.create(driver);
+        resp.sendRedirect(req.getContextPath() + "/drivers");
+    }
+}

src/main/java/mate/controller/CreateManufacturerController.java

@@ -0,0 +1,34 @@
+package mate.controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.model.Manufacturer;
+import mate.service.ManufacturerService;
+
+@WebServlet("/manufacturers/add")
+public class CreateManufacturerController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final ManufacturerService manufacturerService =
+            (ManufacturerService) injector.getInstance(ManufacturerService.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        req.getRequestDispatcher("/WEB-INF/views/manufacturerCreation.jsp").forward(req, resp);
+    }
+
+    @Override
+    public void doPost(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        Manufacturer manufacturer = new Manufacturer();
+        manufacturer.setName(req.getParameter("name"));
+        manufacturer.setCountry(req.getParameter("country"));
+        manufacturerService.create(manufacturer);
+        resp.sendRedirect(req.getContextPath() + "/manufacturers");
+    }
+}

src/main/java/mate/controller/DeleteCarController.java

@@ -0,0 +1,24 @@
+package mate.controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.service.CarService;
+
+@WebServlet("/cars/delete")
+public class DeleteCarController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final CarService carService = (CarService) injector.getInstance(CarService.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        carService.delete(Long.valueOf(req.getParameter("id")));
+        resp.sendRedirect(req.getContextPath() + "/cars");
+    }
+
+}

src/main/java/mate/controller/DeleteDriverController.java

@@ -0,0 +1,25 @@
+package mate.controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.service.DriverService;
+
+@WebServlet("/drivers/delete")
+public class DeleteDriverController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final DriverService driverService =
+            (DriverService) injector.getInstance(DriverService.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        driverService.delete(Long.valueOf(req.getParameter("id")));
+        resp.sendRedirect(req.getContextPath() + "/drivers");
+    }
+
+}

src/main/java/mate/controller/DeleteManufacturerController.java

@@ -0,0 +1,25 @@
+package mate.controller;
+
+import java.io.IOException;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.service.ManufacturerService;
+
+@WebServlet("/manufacturers/delete")
+public class DeleteManufacturerController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final ManufacturerService manufacturerService =
+            (ManufacturerService) injector.getInstance(ManufacturerService.class);
+
+    @Override
+    protected void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        manufacturerService.delete(Long.valueOf(req.getParameter("id")));
+        resp.sendRedirect(req.getContextPath() + "/manufacturers");
+    }
+
+}

src/main/java/mate/controller/GetAllCarsController.java

@@ -0,0 +1,29 @@
+package mate.controller;
+
+import java.io.IOException;
+import java.util.List;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.model.Car;
+import mate.service.CarService;
+import mate.service.ManufacturerService;
+
+@WebServlet("/cars")
+public class GetAllCarsController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final ManufacturerService manufacturerService =
+            (ManufacturerService) injector.getInstance(ManufacturerService.class);
+    private final CarService carService = (CarService) injector.getInstance(CarService.class);
+
+    @Override
+    public void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        List<Car> carList = carService.getAll();
+        req.setAttribute("cars", carList);
+        req.getRequestDispatcher("/WEB-INF/views/allCars.jsp").forward(req, resp);
+    }
+}

src/main/java/mate/controller/GetAllDriversController.java

@@ -0,0 +1,27 @@
+package mate.controller;
+
+import java.io.IOException;
+import java.util.List;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.model.Driver;
+import mate.service.DriverService;
+
+@WebServlet("/drivers")
+public class GetAllDriversController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final DriverService driverService =
+            (DriverService) injector.getInstance(DriverService.class);
+
+    @Override
+    public void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        List<Driver> driverList = driverService.getAll();
+        req.setAttribute("drivers", driverList);
+        req.getRequestDispatcher("/WEB-INF/views/allDrivers.jsp").forward(req, resp);
+    }
+}

src/main/java/mate/controller/GetAllManufacturersController.java

@@ -0,0 +1,27 @@
+package mate.controller;
+
+import java.io.IOException;
+import java.util.List;
+import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
+import javax.servlet.http.HttpServlet;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+import mate.lib.Injector;
+import mate.model.Manufacturer;
+import mate.service.ManufacturerService;
+
+@WebServlet("/manufacturers")
+public class GetAllManufacturersController extends HttpServlet {
+    private static final Injector injector = Injector.getInstance("mate");
+    private final ManufacturerService manufacturerService =
+            (ManufacturerService) injector.getInstance(ManufacturerService.class);
+
+    @Override
+    public void doGet(HttpServletRequest req, HttpServletResponse resp)
+            throws ServletException, IOException {
+        List<Manufacturer> manufacturerList = manufacturerService.getAll();
+        req.setAttribute("manufacturers", manufacturerList);
+        req.getRequestDispatcher("/WEB-INF/views/allManufacturers.jsp").forward(req, resp);
+    }
+}

src/main/java/mate/controller/IndexController.java

@@ -2,10 +2,12 @@
 
 import java.io.IOException;
 import javax.servlet.ServletException;
+import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;
 
+@WebServlet("/index")
 public class IndexController extends HttpServlet {
     @Override
     public void doGet(HttpServletRequest req, HttpServletResponse resp)

src/main/java/mate/util/ConnectionUtil.java

@@ -6,10 +6,10 @@
 import java.util.Properties;
 
 public class ConnectionUtil {
-    private static final String URL = "YOUR DATABASE URL";
-    private static final String USERNAME = "YOUR USERNAME";
-    private static final String PASSWORD = "YOUR PASSWORD";
-    private static final String JDBC_DRIVER = "YOUR DRIVER";
+    private static final String URL = "jdbc:mysql://sql7.freesqldatabase.com:3306/sql7633485";
+    private static final String USERNAME = "sql7633485";
+    private static final String PASSWORD = "erHDpGC53N";
+    private static final String JDBC_DRIVER = "com.mysql.cj.jdbc.Driver";
 
     static {
         try {

src/main/webapp/WEB-INF/views/addingDriverToCar.jsp

@@ -0,0 +1,15 @@
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<%@ page contentType="text/html;charset=UTF-8" %>
+<html>
+<head>
+    <title>Driver adding</title>
+</head>
+<body>
+<h1>Please fill full the form below.</h1>
+<form method="post" action="${pageContext.request.contextPath}/cars/drivers/add">
+    Car ID<input type="number" name="carId" required><br>
+    Driver ID<input type="number" name="driverId" required><br>
+    <button type="submit">Add</button>
+</form>
+</body>
+</html>