Java - WindowBoundsRestorer

import java.awt.Component;
import java.awt.Container;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.Properties;

import org.apache.commons.io.IOUtils;
import org.apache.commons.lang3.StringUtils;

public class WindowBoundsRestorer
{
    private final String xmlFileName;
    private Properties properties;

    public WindowBoundsRestorer(String xmlFileName)
    {
        this.xmlFileName = xmlFileName;
    }

    private void setBounds(String key, Component component)
    {
        key = key + component.getName();

        String position = properties.getProperty(key);

        if (component.getName() != null && !StringUtils.isBlank(position))
        {
            String[] nums = position.split(",");

            component.setBounds(Integer.parseInt(nums[0]), Integer.parseInt(nums[1]),
                    Integer.parseInt(nums[2]), Integer.parseInt(nums[3]));
        }

        if (component instanceof Container)
        {
            key = key + "/";
            Container container = (Container) component;
            for (Component child : container.getComponents())
                setBounds(key, child);
        }
    }

    public void restore(Component component)
    {
        properties = new Properties();

        InputStream reader = null;

        try
        {
            reader = new FileInputStream(xmlFileName);
            properties.loadFromXML(reader);
        } catch (IOException e)
        {
            e.printStackTrace();
            return;
        } finally
        {
            IOUtils.closeQuietly(reader);
        }

        Component top = component;

        while (top.getParent() != null)
            top = top.getParent();

        setBounds("", top);
    }

    private void getBounds(String key, Component component)
    {
        key = key + component.getName();

        String position = String.format("%d,%d,%d,%d", component.getX(), component.getY(),
                component.getWidth(), component.getHeight());

        properties.setProperty(key, position);

        if (component instanceof Container)
        {
            key = key + "/";

            Container container = (Container) component;

            for (Component child : container.getComponents())
                getBounds(key, child);
        }
    }

    public void save(Component component)
    {
        Component top = component;

        while (top.getParent() != null)
            top = top.getParent();

        properties = new Properties();
        getBounds("", top);

        OutputStream writer = null;

        try
        {
            writer = new FileOutputStream(xmlFileName);
            properties.storeToXML(writer, "Browser");
        } catch (IOException e)
        {
            e.printStackTrace();
        } finally
        {
            IOUtils.closeQuietly(writer);
        }
    }
}