title: Write CSV to String using opencsv without creating an actual file or a temp file
body: <p>I'm trying to use the opencsv library to write a csv file. The restriction being that I do not want to create a file on the disk or even a temp file. Is there a way I can achieve it?</p>
  
  <p>From what I looked, the constructor for CSVWriter requires a FileWriter object.</p>
  
  <p>Thanks!</p>