HQL with the full class name

Say I have a Foo entity -

package com.some.company.model;
// imports
@Entity
public class Foo{
    @Id
    private Long id;    

    // getters / setters and other properties omitted   
}

so when working with Entity through HQL, I prefer to reference Entity using the fully qualified class name, for example -

entityManager.createQuery(String.format("delete from %s where id = :id", Foo.class.getName()))
                .setParameter("id", fooId)
                .executeUpdate();

I noticed one thing in the annotation @Entity- by default, the name property has an unqualified name for the entity class. what makes me think why an unconditional name?
What should I use in an unqualified HQL name or fully qualified name?