BasePage.java

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.support.PageFactory;
import org.openqa.selenium.support.ui.WebDriverWait;

import com.google.common.base.Predicate;

public class BasePage {
  private static final Integer EXPLICIT_TIMEOUT = 10;
	private WebDriver browser;
	private WebDriverWait waiter;
	{
		browser = BrowserManager.getBrowser();
		waiter = new WebDriverWait(browser, EXPLICIT_TIMEOUT);
		PageFactory.initElements(browser, this);
	}

	public BasePage(String url) {
		navigateTo(url);
	}

	public WebDriver getBrowser() {
		return browser;
	}

	public void navigateTo(String url) {
		getBrowser().navigate().to(url);
	}

	public void close() {
		if (getBrowser().getWindowHandles().size() == 1) {
			BrowserManager.closeBrowser();
			return;
		}
		getBrowser().close();
	}

	public void waitForTitle(final String title) {
		waiter.until(new Predicate<WebDriver>() {
			@Override
			public boolean apply(WebDriver arg0) {
				return title.equals(getTitle());
			}
		});
	}

	public String getTitle() {
		return getBrowser().getTitle();
	}
}

BrowserManager.java

import org.openqa.selenium.WebDriver;
import org.openqa.selenium.chrome.ChromeDriver;

public final class BrowserManager {
  private static ThreadLocal<WebDriver> driver = new ThreadLocal<WebDriver>();

	public static void closeBrowser() {
		if (driver.get() != null) {
			driver.get().quit();
			driver.set(null);
		}
	}

	public static WebDriver getBrowser() {
		if (driver.get() == null) {
			driver.set(new ChromeDriver());
		}
		return driver.get();
	}
}

Demo.java

public class Demo {

  public static void main(String[] args) {
		new Thread(new Runnable(){
			@Override
			public void run() {
				GoogleHomePage google = new GoogleHomePage();
				google.search("hello!");
				google.waitForTitle("hello! - Поиск в Google");
				System.out.println(google.getTitle());
				google.close();	
			}}).start();
		
		new Thread(new Runnable(){
			@Override
			public void run() {
				GoogleHomePage google = new GoogleHomePage();
				google.search("goodbye!");
				google.waitForTitle("goodbye! - Поиск в Google");
				System.out.println(google.getTitle());
				google.close();	
			}}).start();
	}
}

GoogleHomePage.java

import org.openqa.selenium.WebElement;
import org.openqa.selenium.support.FindBy;

public class GoogleHomePage extends BasePage {
  @FindBy(xpath = "//input[not(@disabled or @type='hidden')]")
	private WebElement searchTextField;

	public GoogleHomePage() {
		super("http://google.ru");
	}

	public void search(String searchText) {
		searchTextField.sendKeys(searchText);
		searchTextField.submit();
	}
}