Grant access to database in a server for domain user

EXEC master..sp_MSForEachDB '

if(''?'' not in (''master'',''msdb'',''tempdb'',''model''))
begin
print ''use ''+''?''
print ''go''
print ''CREATE USER [Domain\user] FOR LOGIN [Domain\user]''
print ''go''
print ''EXEC sp_addrolemember N''''db_datareader'''', N''''Domain\user''''''
print ''go''
print ''EXEC sp_addrolemember N''''db_executor'''', N''''Domain\user''''''
print ''go''

end
'
go