Adding the JPA repository

package com.example.Mapping.Repositories;

import com.example.Mapping.Models.Manufactures;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * Spring Data JPA repository for the Manufacture entity.
 * This interface extends JpaRepository and provides basic 
 * CRUD operations for Manufactures entities.
 */
public interface ManufacturesRepo extends JpaRepository<Manufactures, Integer> {
}

package com.example.Mapping.Repositories;

import com.example.Mapping.Models.Model;
import org.springframework.data.jpa.repository.JpaRepository;

/**
 * Spring Data JPA repository for the Model entity.
 * This interface extends JpaRepository and provides basic 
 * CRUD operations for Model entities.
 */
public interface ModelRepo extends JpaRepository<Model, Integer> {
}

package com.example.Mapping;

import com.example.Mapping.Models.Manufactures;
import com.example.Mapping.Models.Model;
import com.example.Mapping.Repositories.ManufacturesRepo;
import com.example.Mapping.Repositories.ModelRepo;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

/**
 * Spring Boot application for mapping relationships between Manufactures and Models.
 */
@SpringBootApplication
public class MappingApplication implements CommandLineRunner {

    // Injecting Manufactures and Model repositories using autowiring
    @Autowired
    private ManufacturesRepo manufacturesRepo;
    @Autowired
    private ModelRepo modelRepo;

    public static void main(String[] args) {
        SpringApplication.run(MappingApplication.class, args);
    }

    @Override
    public void run(String... args) throws Exception {

        // Creating a new Manufactures object with ID 1 and name "Honda"
        Manufactures data = new Manufactures(1, "Honda");

        // Saving the Manufactures record
        manufacturesRepo.save(data);

        // Creating two new Model objects associated with the "Honda" manufacturer
        Model model1 = new Model(1, "AYZ", data);
        Model model2 = new Model(2, "ZET", data);

        // Saving the Model records
        modelRepo.save(model1);
        modelRepo.save(model2);
    }
}