resolved #9 added test to verify bothify works

pom.xml

@@ -61,5 +61,11 @@
             <version>4.8.2</version>
             <scope>test</scope>
         </dependency>
+
+        <dependency>
+            <groupId>org.hamcrest</groupId>
+            <artifactId>hamcrest-all</artifactId>
+            <version>1.3</version>
+        </dependency>
     </dependencies>
 </project>

src/test/java/com/github/javafaker/BothifyTest.java

@@ -0,0 +1,13 @@
+package com.github.javafaker;
+
+import org.junit.Assert;
+import org.junit.Test;
+
+public class BothifyTest {
+	private Faker faker = new Faker();
+
+    @Test
+    public void shouldGenerateLettersAndNumbers() {
+    	Assert.assertTrue(faker.bothify("????##@gmail.com").matches("\\w{4}\\d{2}@gmail.com"));
+    }
+}