Small Read from file, write to file utility

A Java Class that I wrote for my own use. Just to have ease of access.....
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package buddi.thesis;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

public class DataStore {

private PrintWriter writer=null;
private BufferedReader reader=null;
public DataStore(String input, String output)
{
try {
reader = new BufferedReader(new FileReader(input));
writer = new PrintWriter(new File(output));
} catch (FileNotFoundException e) {
e.printStackTrace();
}
}

public String getNextItem()
{
if(reader==null)
return null;
String temp;
try {
temp = reader.readLine();
if(temp!=null)
return temp;
} catch (IOException e) { }
return null;
}

public void writeToOutput(String text)
{
if(writer==null)
{
System.out.println("ERROR : COULD NOT WRITE TO OUTPUT!");
return;
}
writer.println(text);
writer.flush();
}

public void close()
{
try {
reader.close();
writer.close();
reader=null;
writer=null;
} catch (IOException e) {
}
}
}