How to create Liquibase changesets automatically?

I want to generate a changelog file automatically via one of the maven liquibase plugin commands. The changelog should include a changeset for creating a database table for the DiscountCode entity. Would diff be the correct plugin command for this case?

@Entity
@Table(name = "discount_code")
public class DiscountCode {

    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
    private Long discountId;

    private String discountCode;
    private LocalDate expiration;
    private BigDecimal discountValue;

    public DiscountCode() {}

    public DiscountCode(String discountCode, LocalDate expiration, BigDecimal discountValue) {
        this.discountCode = discountCode;
        this.expiration = expiration;
        this.discountValue = discountValue;
    }

    public Long getDiscountId() {
        return discountId;
    }

    public void setDiscountId(Long discountId) {
        this.discountId = discountId;
    }

    public String getDiscountCode() {
        return discountCode;
    }

    public void setDiscountCode(String discountCode) {
        this.discountCode = discountCode;
    }

    public LocalDate getExpiration() {
        return expiration;
    }

    public void setExpiration(LocalDate expiration) {
        this.expiration = expiration;
    }

    public BigDecimal getDiscountValue() {
        return discountValue;
    }

    public void setDiscountValue(BigDecimal discountValue) {
        this.discountValue = discountValue;
    }

    @Override
    public String toString() {
        return (
            "DiscountCode{" +
            "discountId=" +
            discountId +
            ", discountCode='" +
            discountCode +
            '\'' +
            ", expiration=" +
            expiration +
            ", discountValue=" +
            discountValue +
            '}'
        );
    }
}

These are the available liquibase commands: