If you are looking to write a package that provides a set of entities, you must make sure that Doctrine finds your entities inside your package.
To do so, you must write a Mouf install script for your package.
In this install process, you can use the DoctrineInstallUtils class to register your package entities:
$doctrineInstallUtils = new DoctrineInstallUtils($moufManager);
// Register classic Doctrine entities (with annotations):
// First parameter is the namespace of the entities
// Second parameter is the directory of the entities
$doctrineInstallUtils->registerAnnotationBasedEntities('My\Namespace', 'src/my/directory');
// Register YAML mapping files for Doctrine entities:
// First parameter is the namespace of the entities
// Second parameter is the directory of the mapping files
$doctrineInstallUtils->registerYamlBasedEntities('My\Namespace', 'src/my/directory');
// Register XML mapping files for Doctrine entities:
// First parameter is the namespace of the entities
// Second parameter is the directory of the mapping files
$doctrineInstallUtils->registerXmlBasedEntities('My\Namespace', 'src/my/directory');