diff --git a/dbcleaner.cabal b/dbcleaner.cabal
--- a/dbcleaner.cabal
+++ b/dbcleaner.cabal
@@ -1,5 +1,5 @@
 name:           dbcleaner
-version:        0.1.0
+version:        0.1.1
 synopsis:       Clean database tables automatically around hspec tests
 description:    A simple database cleaner library for testing that provides
                 different cleanup strategies.
diff --git a/src/Database/DBCleaner/PostgreSQLSimple.hs b/src/Database/DBCleaner/PostgreSQLSimple.hs
--- a/src/Database/DBCleaner/PostgreSQLSimple.hs
+++ b/src/Database/DBCleaner/PostgreSQLSimple.hs
@@ -12,6 +12,7 @@
 
 import           Database.DBCleaner.Types         (Strategy (..))
 
+-- | Connection wrapper that cleans up the database using the strategy specified.
 withConnection :: Strategy -> (Connection -> IO a) -> Connection -> IO a
 withConnection Transaction f c = bracket (begin c >> return c) rollback f
 withConnection Truncation f c = finally (f c) $ listTables c >>= mapM_ (truncateTable c)
diff --git a/src/Database/DBCleaner/Types.hs b/src/Database/DBCleaner/Types.hs
--- a/src/Database/DBCleaner/Types.hs
+++ b/src/Database/DBCleaner/Types.hs
@@ -1,3 +1,6 @@
 module Database.DBCleaner.Types where
 
-data Strategy = Transaction | Truncation
+data Strategy = Transaction -- ^ Wraps all the queries inside a transaction and
+                            --   rollback everything once the execution is done.
+              | Truncation  -- ^ Truncate all the tables after the execution of
+                            --   the queries.