Правильная работа с файловыми потоками

package com.noveogroup.java.serialize;
 
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
 
/**
 * blablabla
 * @author artem ryzhikov
 */
public class Serializer {
 
    private ObjectInputStream ois;
    private ObjectOutputStream oos;
 
    private final static Logger LOG = Logger.getLogger(Serializer.class.getName());
 
    public Serializer(final File input , final File output) {
        try {
            ois = new ObjectInputStream(new FileInputStream(input));
            oos = new ObjectOutputStream(new FileOutputStream(output));
        } catch (IOException e){
            LOG.log(Level.SEVERE, "IOException Serializer() :", e);
        }
    }
    public void store(final Object obj) throws IOException {
        if(oos == null) {
            throw new IOException("ObjectOutputStream is null");
        }
        else {
            oos.writeObject(obj);
//            oos.close();
        }
    }
    public Object load() throws IOException , ClassNotFoundException {
        if(ois == null){
            throw new IOException("ObjectInputStream is null");
        }
        Object result = ois.readObject();
//        ois.close();
        return  result;
    }
 
    public void close() {
        try{
            ois.close();
            oos.close();
        } catch (IOException e) {
            LOG.log(Level.SEVERE, "IOException in ObjectStream.close(): ", e);
        }
    }
 
}

class Serializer {
    private final static Logger LOG = Logger.getLogger(Serializer.class.getName());
 
    public void store(final Object obj, final File output) throws IOException {
        try (ObjectOutputStream oos = new ObjectOutputStream(new FileOutputStream(output))){
            oos.writeObject(obj);
        } catch (IOException e){
            LOG.log(Level.SEVERE, "IOException store() :", e);
            throw e;
        }
    }
    public Object load(final File input ) throws IOException , ClassNotFoundException {
        try (ObjectInputStream ois = new ObjectInputStream(new FileInputStream(input))){
            return ois.readObject();
        } catch (IOException e){
            LOG.log(Level.SEVERE, "IOException load() :", e);
            throw e;
        }
    }
}