TestNG Suite Set up and Tear Down

ackage selenium.src.com.ofb.supportClasses;

import java.util.concurrent.TimeUnit;

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.WebDriverBackedSelenium;
import org.openqa.selenium.firefox.FirefoxDriver;
import org.openqa.selenium.ie.InternetExplorerDriver;
import org.openqa.selenium.support.events.EventFiringWebDriver;
import org.openqa.selenium.support.events.WebDriverEventListener;
import org.testng.annotations.AfterMethod;
import org.testng.annotations.BeforeMethod;
import org.testng.annotations.Optional;
import org.testng.annotations.Parameters;

public class OfbTestSet{
   
    private WebDriver webDriver;
    private String testUrl, loginID, password;
   
    @BeforeMethod(alwaysRun = true)
    @Parameters({"browser", "testUrl", "loginID", "password"})
    public  void setUp(@Optional ("") String browser,
            @Optional ("") String testUrl,
            @Optional ("") String loginID,
            @Optional ("") String password) throws Exception{
       
        if (browser.contentEquals(""))
            browser = ReadProperty.commonValueProps.getProperty("browser");
        if (testUrl.contentEquals(""))
            testUrl = ReadProperty.commonValueProps.getProperty("testUrl");
        if (loginID.contentEquals(""))
            loginID = ReadProperty.commonValueProps.getProperty("LoginID");
        if (password.contentEquals(""))
            password = ReadProperty.commonValueProps.getProperty("Password");
       
        this.testUrl = testUrl; this.loginID = loginID; this.password = password;
       
        if (browser.contentEquals("firefox"))
        {
            //FirefoxProfile ofbFF = new FirefoxProfile(new File("OfbFirefoxProfile/data"));
            //ofbFF.setAcceptUntrustedCertificates(false);
            //ofbFF.setAssumeUntrustedCertificateIssuer(false);
            //ofbFF.setPreference("network.dns.disableIPv6", true);
            //ofbFF.setEnableNativeEvents(false);
           
            WebDriverEventListener eventListener = new CustomEventListener();
            webDriver = new EventFiringWebDriver(new FirefoxDriver()).register(eventListener);
        }
       
        if (browser.contentEquals("iexplorer"))
        {
            WebDriverEventListener eventListener = new CustomEventListener();
            webDriver = new EventFiringWebDriver(new InternetExplorerDriver()).register(eventListener);
        }
        webDriver.manage().timeouts().implicitlyWait(30, TimeUnit.SECONDS);
       
        webDriver.get(testUrl);
       
        //To maximize the browser window
        WebDriverBackedSelenium selenium = new WebDriverBackedSelenium(webDriver, "");
        selenium.windowMaximize();
    }

    @AfterMethod(alwaysRun = true)
    public void tearDown() throws Exception {
        webDriver.quit();
    }
   
    public WebDriver getWebDriver() {
        return webDriver;
    }

    public String getTestUrl(){
        return testUrl;
    }
   
    public String getLoginID(){
        return loginID;
    }
   
    public String getPassword(){
        return password;
    }

}