Mehrdimensionale ArrayList zu CSV exportieren

import java.sql.*;
import java.util.ArrayList;
import java.util.List;
import java.io.*;

//import java.lang.Object;
//import com.csvreader.*;


public class Abfrage {
	
	public static void main (String args) throws IOException{		
		
		String cmd = null;
		int counter = 0;
		Connection con1 = null;
		List< List<String>> list1 = new ArrayList< List<String>>();

		//Datenbank Treiber laden
		try{
			Class.forName("com.informix.jdbc.IfxDriver");  
		}catch(Exception e){
			System.out.println("ERROR: failed to load Informix JDBC driver.");  
		}
		
		//Datenbankzugang - qm_milch - URL - Connection
		try{
			con1 = DriverManager.getConnection("DATENBANK_URL");  
			con1.setReadOnly(true);
		}catch(SQLException e){
			System.out.println("Error: Failed to connect1\n" + e.getMessage());  
		}
		
/*		//Datenbankzugang - vvvo - URL - Connection
		try{
			con2 = DriverManager.getConnection("DATENBANK_URL"); 
			con2.setReadOnly(true);
		}catch(SQLException e){
			System.out.println("Error: Failed to connect2\n" ); 
			e.printStackTrace(System.err);
		}*/
		
		
		//QM_milch Daten
		try{
			Statement stmt1 = con1.createStatement();
			cmd= "qm_milch;";  
			ResultSet rs1 = stmt1.executeQuery("select name1, lief_nr, strasse, plz, ort, vvvo_nr from lieferanten");  
			String daten1;
			daten1 = new String[9999];
			FileWriter foutputstream = new FileWriter("lieferanten.csv");  
			BufferedWriter out1 = new BufferedWriter(foutputstream);
			int columnCount = rs1.getMetaData().getColumnCount();
			
			while(rs1.next()){
				list1.add(new ArrayList<String>());
				
				
				for(int i=0; i < rs1.getMetaData().getColumnCount(); i++){
					String strtmp = rs1.getString(i+1);
					
					if (strtmp != null) {
						strtmp = strtmp.trim();
					}
					
					list1.get(counter).add(strtmp);
					
					if (list1.get(counter).get(i) != null) {
						System.out.printf("%40s", list1.get(counter).get(i));						  
					}
				}
				System.out.println();
				counter++;				
			}			
			
			out1.close();
			con1.close();
			rs1.close();
			stmt1.close();
		}catch(SQLException e){
			System.err.println("ERROR: execution failed - statement " + cmd);  
			System.err.println("ERROR: " + e.getMessage());  
			e.printStackTrace(System.err);
		}
	}
}