Crud with related tables in spring mvc

I'm developing a java application, using spring mvc . And in a CRUD functionality, I have an Incident signup screen. On this screen, I have the fields mapped according to the entity Incident.java. However in the registration screen I have more fields that are not part of this entity, it is part of another entity. What would be the best way to solve this?

Model:

Class,model,Incident:

publicclassIncidente{@Id@Column(name="ID")
    private Integer id;

    @Column(name = "CD_TICKET")
    private Integer ticket;

    @Column(name = "DESC_RESUMIDA")
    private String descricaoResumida;
}

Class model Company:

public class Empresa {

    @Id
    @Column(name = "ID")
    private int id;

    @Column(name = "NM_EMPRESA")
    private String nome;
}

Class model Impact:

public class Impacto implements Serializable {

    /**
     * Serial Version
     */
    private static final long serialVersionUID = 1L;

    @Id
    @NotNull
    @ManyToOne
    @JoinColumn(name = "ID_INCIDENTE")
    private Incidente incidente;

    @Id
    @NotNull
    @ManyToOne
    @JoinColumn(name = "ID_SERVICO")
    private Servico servico;

}

Class model Service:

public class Servico {

    @Id
    @Column(name = "ID")
    private Integer id;

    @Column(name = "NM_SERVICO")
    private String nome;
}

Note: Remembering that in the incident log, I have a combobox (select / dropdowlist), services, and also companies. On this screen I should be able to report the impacts of this incident, for example:

In the record of incident 1, I will inform you: *

incidente 1 - impacta o servico A
incidente 1 - impacta o servico C
incidente 1 - impacta o servico J

*

This will save on the impact table: *

incidente 1 - servico A
incidente 1 - servico C
incidente 1 - servico J
incidente 2 - servico A
incidente 3 - servico D

etc ... *