@Entity
public class Customer extends Company {

    @ManyToOne(fetch = FetchType.LAZY, cascade = ALL)
    @JoinTable(name = "company_services",
            joinColumns = @JoinColumn(name = "companyId", insertable = true, updatable = true),
            inverseJoinColumns = @JoinColumn(name = "serviceId", insertable = true, updatable = true))
    private Service service;

@Entity
public class Service {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long id;

Hibernate:
    /* insert com.example.company.Customer
        */ insert
        into
            `
            companies` (
                ...
            )
        values
            (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)
Hibernate:
    select
        last_insert_id()
Hibernate:
    /* insert com.example.company.Customer
        */ insert
        into
            `
            company_service` (
                `serviceId`, `companyId`
            )
        values
            (?, ?)