<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>
<property name="hibernate.hbm2ddl.auto" value="create-drop"/>
<property name="hibernate.globally_quoted_identifiers" value="false" />
<property name="hibernate.show_sql" value="false" />

@Entity @Table(name="release")
public class Release implements Serializable, IHasTraits {

    @Temporal(TemporalType.DATE)
    @Column(columnDefinition="TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP", insertable=false, updatable=false)
    private Date lastChanged = new Date();
}

create table `release` (... `lastChanged` `TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP`, ...