JAVA IO store and read objects

package satish.snt.java;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.OutputStream;
import java.io.Serializable;

public class MyObjectFileStore {

    public void storeObject(Employee emp){

        OutputStream ops = null;
        ObjectOutputStream objOps = null;
        try {
            ops = new FileOutputStream("MyEmpFile.txt");
            objOps = new ObjectOutputStream(ops);
            objOps.writeObject(emp);
            objOps.flush();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally{
            try{
                if(objOps != null) objOps.close();
            } catch (Exception ex){

            }
        }

    }

    public void displayObjects(){

        InputStream fileIs = null;
        ObjectInputStream objIs = null;
        try {
            fileIs = new FileInputStream("MyEmpFile.txt");
            objIs = new ObjectInputStream(fileIs);
            Employee emp = (Employee) objIs.readObject();
            System.out.println(emp);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (ClassNotFoundException e) {
            e.printStackTrace();
        } finally {
            try {
                if(objIs != null) objIs.close();
            } catch (Exception ex){

            }
        }

    }

    public static void main(String a[]){
        MyObjectFileStore mof = new MyObjectFileStore();
        Employee e1 = new Employee("satish",1,"1000");
        mof.storeObject(e1);
        mof.displayObjects();

           Employee e2 = new Employee("dodia",2,"12000");
        mof.storeObject(e2);
        mof.displayObjects();
    }
}

class Employee implements Serializable{

    private String name;
    private int id;
    private String salary;

    public Employee(String name, int id, String salary){
        this.name = name;
        this.id = id;
        this.salary = salary;
    }

    public String toString(){
        return name +"=="+id+"=="+salary;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getId() {
        return id;
    }

    public void setId(int id) {
        this.id = id;
    }

    public String getSalary() {
        return salary;
    }

    public void setSalary(String salary) {
        this.salary = salary;
    }
}

outuput:

satish==1==1000
dodia==2==12000