I want to study for Masters degree in Portugal. I...

According to the given facts and for clarification purposes, we would like to explain to you,
If you need to get your entry visa to Romania, you have to go to the Romanian embassy. Submit an application for a tourist visa, and attach the following documents:
Valid passport for a period of not less than six months.
Bank statement for the last six months.
NOC from your employer
Salary pay slip
Booking of flight tickets.
Hotel reservation.
Academic certificates
Finally, the embassy may ask for more other documents, as they consider necessary after reviewing the application for the visa and the documents attached thereto.