Fix Checkstyle violations

- Mostly missing Javadoc on large methods
- CommandInitializer: split command building method into multiple methods

src/test/java/fr/xephi/authme/security/crypts/TwoFactorTest.java

@@ -25,7 +25,7 @@ public class TwoFactorTest {
         String secret = "3AK6Y4KWGRLJMEQW";
 
         // when
-        String url = TwoFactor.getQRBarcodeURL(user, host, secret);
+        String url = TwoFactor.getQrBarcodeUrl(user, host, secret);
 
         // then
         String expected = "https://www.google.com/chart?chs=130x130&chld=M%7C0&cht=qr"

src/test/java/fr/xephi/authme/service/MigrationServiceTest.java

@@ -28,7 +28,6 @@ import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
 import static org.mockito.hamcrest.MockitoHamcrest.argThat;
-import static fr.xephi.authme.AuthMeMatchers.equalToHash;
 
 /**
  * Test for {@link MigrationService}.

src/test/java/fr/xephi/authme/settings/commandconfig/CommandManagerTest.java

@@ -178,6 +178,19 @@ public class CommandManagerTest {
         verifyZeroInteractions(bukkitService, geoIpService);
     }
 
+    @Test
+    public void shouldExecuteCommandOnUnregister() {
+        // given
+        copyJarFileAsCommandsYml(TEST_FILES_FOLDER + "commands.incomplete.yml");
+        initManager();
+
+        // when
+        manager.runCommandsOnUnregister(player);
+
+        // then
+        verify(bukkitService).dispatchConsoleCommand("msg Bobby sad to see you go!");
+    }
+
     @Test
     public void shouldHaveHiddenConstructorInSettingsHolderClass() {
         // given / when / then