Selenium maintaining single instance of driver

Selenium maintaining single instance of driver

 package com.sudas.xxxx;  
 import org.openqa.selenium.WebDriver;  
 import org.openqa.selenium.chrome.ChromeDriver;  
 public class SameInstanceOfDriver {  
      static WebDriver webDriver;  
      static WebDriver driver;  
      public static void main(String[] args) {  
           driverInitializer(webDriver);  
           openBrowser();  
           openBrowser1();  
      }  
      public static void driverInitializer(WebDriver driver) {  
           System.setProperty("webdriver.chrome.driver", "/Users/S_Das/Documents/Java/chromedriver");  
           driver = new ChromeDriver();  
           SameInstanceOfDriver.driver = driver;  
      }  
      public static void openBrowser() {  
           driver.get("https://in.yahoo.com/");  
      }  
      public static void openBrowser1() {  
           driver.get("https://www.google.co.in/?gws_rd=ssl");  
      }  
 }