SPWebApplication elevatedWebApp = spWeb.Site.WebApplication;
                        string serverName = "xxxxxx";
                        string newDbName = "WSS_Content_1";
                        string username = "xxxx\spfarm";
                        string password = "xxxxx";
                        var contentDatabase = elevatedWebApp.ContentDatabases.Add(serverName,newDbName,username,password,0,1,0);

                        contentDatabase.Update();
                        elevatedWebApp.Update();