Work on #385, added documentation and class diagram. Made refactoring changes to pass checkstyle and PMD checks

mute-idiom/src/test/java/com/iluwatar/mute/AppTest.java

@@ -9,7 +9,7 @@ import org.junit.Test;
 public class AppTest {
 
   @Test
-  public void test() {
+  public void test() throws Exception {
     App.main(null);
   }
 }

mute-idiom/src/test/java/com/iluwatar/mute/MuteTest.java

@@ -20,6 +20,7 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
  */
+
 package com.iluwatar.mute;
 
 import static org.junit.Assert.assertTrue;
@@ -38,6 +39,11 @@ public class MuteTest {
   
   @Rule public ExpectedException exception = ExpectedException.none();
   
+  @Test
+  public void muteShouldRunTheCheckedRunnableAndNotThrowAnyExceptionIfCheckedRunnableDoesNotThrowAnyException() {
+    Mute.mute(() -> methodNotThrowingAnyException());
+  }
+  
   @Test
   public void muteShouldRethrowUnexpectedExceptionAsAssertionError() throws Exception {
     exception.expect(AssertionError.class);
@@ -46,8 +52,9 @@ public class MuteTest {
     Mute.mute(() -> methodThrowingException());
   }
   
-  private void methodThrowingException() throws Exception {
-    throw new Exception(MESSAGE);
+  @Test
+  public void loggedMuteShouldRunTheCheckedRunnableAndNotThrowAnyExceptionIfCheckedRunnableDoesNotThrowAnyException() {
+    Mute.loggedMute(() -> methodNotThrowingAnyException());
   }
   
   @Test
@@ -59,4 +66,13 @@ public class MuteTest {
     
     assertTrue(new String(stream.toByteArray()).contains(MESSAGE));
   }
+  
+  
+  private void methodNotThrowingAnyException() {
+    System.out.println("Executed successfully");
+  }
+  
+  private void methodThrowingException() throws Exception {
+    throw new Exception(MESSAGE);
+  }
 }