How to create a CSV file in java

Hi,
I have a requirement to create a CSV file using this open source package au.com.bytecode.opencsv.CSVWriter;

Here is what my requirement is:
1) Retrieve User information from database. I get it in the Java Bean object:- I have done this part here is the sample code
List<BusinessUser> users = usedao.getUsers();
//CSVWriter writer = new CSVWriter(new Writer("path"), "|" );
            if (users != null && users.size() > 1) {
                              Iterator<BusinessUser> it = users.iterator();
                  while (it.hasNext()){
                        BusinessUser bu = it.next();
                        // Test
                        String loginName = bu.getLoginName();
                        String firstName = bu.getFistName();
                        String lastName = bu.getLastName();
                        
                  }
                  
            }
2) public void createHeaderToCSVFile(){
            // Header name are" Login Name", "First Name" "Last Name".... there are more colums, but to make it easy for the post I have included only 3 columns
      }

3) public void writeRowToCSVFile(){
            
      }

Can someone please help me on this. I need to use | delimeter.

Thanks