[D] admin
[D] contracts
[F] class-addon-abstract.php
[F] class-addon-container.php
[F] class-addon-exception.php
[F] class-addon-form-hooks-abstract.php
[F] class-addon-form-settings-abstract.php
[F] class-addon-poll-hooks-abstract.php
[F] class-addon-poll-settings-abstract.php
[F] class-addon-quiz-hooks-abstract.php
[F] class-addon-quiz-settings-abstract.php