File overwriting?

[OllyHal]

Basically I am trying to save to a csv file however it keeps overwriting my previous file, while instead I would like it to add to the end of the file. Here is my code :

	String generateCSVFile = "test.csv";
		File f;
		f = new File("test.csv");
			    if(!f.exists()){
		    	  try {
					f.createNewFile();
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
		    	  System.out.println("New file \"test.csv\" has been created to the current directory");
		    	  }
		
		
			  
			try
			{
			    FileWriter writer = new FileWriter(generateCSVFile);
			    BufferedWriter out = new BufferedWriter(writer);
		 
			    out.append(UsernameTxt.getText());
			    out.append(',');
			    out.append(PasswordFld.getText());
			    out.append('\n');
		 		 
			    out.flush();
			    out.close();
			    NLbl.setText("File saved");
			}
			catch(IOException e)
			{
			     e.printStackTrace();
			} 
		    }

Can you see what is wrong with it?

[OllyHal]

Figured out that I did not put the boolean for the end of file in the FileWriter part.

 FileWriter writer = new FileWriter(generateCSVFile, true);