Duvida! executar regra de iptables por programa java

Process proc2 = run.exec("iptables-save");
		//processo para pegar, tratar e imprimir a saida do comando acima		
		{
       	InputStream inputStream = proc2.getInputStream();   
		String saida = "";
		{
		int n;
		while ((n = inputStream.read()) != -1) {   
		saida += (char)n;  }}
		System.out.println(saida);}

package criarArquivo;

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;

public class ExemploCriarArquivo {

	
	public static void main(String[] args) {
		
		File file = null;
		FileWriter writer = null;
				
		try {
			
			String someStuff = "Some stuff";
			file = new File("/home/fulano/someStuff.txt");
			file.createNewFile();
			writer = new FileWriter(file);
			writer.write(someStuff);
			
		}
		catch (IOException e) {
			e.printStackTrace();
		}
		finally{
			if(!(writer == null)){
				try {
					writer.close();
				} catch (IOException e) {
					e.printStackTrace();
				}
		 }
		}
	}
	
}