Make storage.database.manager ctor API consistent with its subclasses.

Also, make it call _parse to simplify subclasses.

neo/storage/database/btree.py

@@ -122,7 +122,7 @@ def safeIter(func, *args, **kw):
 class BTreeDatabaseManager(DatabaseManager):
 
     def __init__(self, database):
-        super(BTreeDatabaseManager, self).__init__()
+        super(BTreeDatabaseManager, self).__init__(database)
         self.setup(reset=1)
 
     @property

neo/storage/database/manager.py

@@ -25,13 +25,16 @@ class CreationUndone(Exception):
 class DatabaseManager(object):
     """This class only describes an interface for database managers."""
 
-
-
-    def __init__(self):
+    def __init__(self, database):
         """
             Initialize the object.
         """
         self._under_transaction = False
+        self._parse(database)
+
+    def _parse(self, database):
+        """Called during instanciation, to process database parameter."""
+        pass
 
     def isUnderTransaction(self):
         return self._under_transaction

neo/storage/database/mysqldb.py

@@ -56,8 +56,7 @@ class MySQLDatabaseManager(DatabaseManager):
     _use_partition = False
 
     def __init__(self, database):
-        super(MySQLDatabaseManager, self).__init__()
-        self.user, self.passwd, self.db, self.socket = self._parse(database)
+        super(MySQLDatabaseManager, self).__init__(database)
         self.conn = None
         self._config = {}
         self._connect()
@@ -65,8 +64,8 @@ class MySQLDatabaseManager(DatabaseManager):
     def _parse(self, database):
         """ Get the database credentials (username, password, database) """
         # expected pattern : [user[:password]@]database[unix_socket]
-        return re.match('(?:([^:]+)(?::(.*))?@)?([^./]+)(.+)?$',
-                        database).groups()
+        self.user, self.passwd, self.db, self.socket = re.match(
+            '(?:([^:]+)(?::(.*))?@)?([^./]+)(.+)?$', database).groups()
 
     def close(self):
         self.conn.close()