final StandardServiceRegistry ssr = new StandardServiceRegistryBuilder().applySetting( AvailableSettings.HBM2DDL_AUTO, "create-drop" ).build();
try {
  final Metadata metadata = new MetadataSources( ssr )
    .addAnnotatedClass( SomeEntity.class )
    .getMetadataBuilder()
    .build();
  // do stuff
}
finally {
  StandardServiceRegistryBuilder.destroy( ssr );
}