Basic implementation of a factory pattern to create browser instances using Selenium WebDriver

DriverFactory.java

public class DriverFactory {

    public WebDriver createInstance(String browser) {
        WebDriver driver;
        BrowserList browserType = BrowserList.valueOf(browser.toUpperCase());

        switch (browserType) {

            case CHROME:
                driver = new ChromeDriverManager().createDriver();
                break;
            case FIREFOX:
                driver = new FirefoxDriverManager().createDriver();
                break;
            case EDGE:
                driver = new EdgeDriverManager().createDriver();
                break;
            case SAFARI:
                driver = new SafariDriverManager().createDriver();
                break;
            case OPERA:
                driver = new OperaDriverManager().createDriver();
                break;
            case IE:
                driver = new IEDriverManager().createDriver();
                break;
            default:
                throw new BrowserNotSupportedException(browser);
        }
        return driver;
    }

    public enum BrowserList {
        CHROME, FIREFOX, EDGE, SAFARI, OPERA, IE
    }
}