org.hibernate.MappingException: Could not determine type for: ...

@Embeddable
public static class Publisher {
	private String name;
	@ManyToOne(fetch = FetchType.LAZY)
	private Country country;
	//Getters and setters, equals and hashCode methods omitted for brevity
}
@Entity(name = "Book")
@AttributeOverrides({
	@AttributeOverride(
		name = "ebookPublisher.name",
		column = @Column(name = "ebook_publisher_name")
	),
	@AttributeOverride(
		name = "paperBackPublisher.name",
		column = @Column(name = "paper_back_publisher_name")
	)
})
@AssociationOverrides({
	@AssociationOverride(
		name = "ebookPublisher.country",
		joinColumns = @JoinColumn(name = "ebook_publisher_country_id")
	),
	@AssociationOverride(
		name = "paperBackPublisher.country",
		joinColumns = @JoinColumn(name = "paper_back_publisher_country_id")
	)
})
public static class Book {
	@Id
	@GeneratedValue
	private Long id;
	private Publisher ebookPublisher;
	private Publisher paperBackPublisher;
	//Getters and setters are omitted for brevity
}