manyres.py

class Cleanable(object):
    def __init__(self):
        self.resources = []

    def add_resource(self, name, obj):
        setattr(self, name, obj)
        self.resources.append(obj)

    def close(self):
        for res in self.resources:
            res.close()


class ManyResources(Cleanable):
    def __init__(self):
        super(ManyResources, self).__init__()
        try:
            self.add_resource('resource1', Resource1)
            self.add_resource('resource2', Resource2)
            self.add_resource('resource3', Resource3)
            self.add_resource('resource4', Resource4)
        except (Resource1Error, Resource2Error, Resource3Error, Resource4Error) as e:
            self.close()
            raise e