Fixes #539 -- document which interfaces a backend implements
diff --git a/docs/hazmat/backends/commoncrypto.rst b/docs/hazmat/backends/commoncrypto.rst
index af2032b..7bf1bc4 100644
--- a/docs/hazmat/backends/commoncrypto.rst
+++ b/docs/hazmat/backends/commoncrypto.rst
@@ -11,7 +11,14 @@
.. data:: cryptography.hazmat.backends.commoncrypto.backend
- This is the exposed API for the CommonCrypto backend. It has one public attribute.
+ This is the exposed API for the CommonCrypto backend.
+
+ * :class:`~cryptography.hazmat.backends.interfaces.CipherBackend`
+ * :class:`~cryptography.hazmat.backends.interfaces.HashBackend`
+ * :class:`~cryptography.hazmat.backends.interfaces.HMACBackend`
+ * :class:`~cryptography.hazmat.backends.interfaces.PBKDF2HMACBackend`
+
+ It has one additional public attribute.
.. attribute:: name