How can I test persistence class in Java?

How should I write test in Junit to test below class?

Will be grateful for sample code or description how to do it.

import javax.persistence.*;

@Entity
@Table(name="TechError")

public class TechError implements java.io.Serializable{
private static final long serivalVersionUID = 1L;

    @Id
    @GeneratedValue(generator = "uuid2") @GenericGenerator(name = "uuid2", strategy = "uuid2")
    @Column(name="ID", unique=true, nullable=false, length=50)
    private String id;

    @Column(name="CATEGORY", nullable=true, length=50)
    private String errCategory;

    @Column(name="TYPE", nullable=true, length=50)
    private String errType;


/**
*   getter and setter here
*/
}