Added levenshtein distance method and corresponding tests

pom.xml

@@ -11,5 +11,11 @@
   		<artifactId>junit</artifactId>
   		<version>4.11</version>
   	</dependency>
+  	<!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
+	<dependency>
+	    <groupId>org.apache.commons</groupId>
+	    <artifactId>commons-lang3</artifactId>
+	    <version>3.5</version>
+	</dependency>
   </dependencies>
 </project>

src/main/java/exampleProject/LevenshteinDistance.java

@@ -0,0 +1,10 @@
+package exampleProject;
+import org.apache.commons.lang3.StringUtils;
+
+public class LevenshteinDistance {
+
+	public int getLevDistance(String string1, String string2) {
+		return StringUtils.getLevenshteinDistance(string1, string2);
+	}
+
+}

src/test/java/exampleProject/LevenshteinDistanceTest.java

@@ -0,0 +1,17 @@
+package exampleProject;
+
+import static org.junit.Assert.*;
+
+import org.junit.Test;
+
+public class LevenshteinDistanceTest {
+
+	@Test
+	public void test() {
+		LevenshteinDistance ld = new LevenshteinDistance();
+		assertEquals(2, ld.getLevDistance("Dog", "God"));
+		assertEquals(1, ld.getLevDistance("Hello", "Hell"));
+		assertEquals(18, ld.getLevDistance("Maven is pretty cool", "Sandwich lady is life"));
+	}
+
+}