Update checkstyle config and CodeClimate exclusions

- Add new checkstyle checks: require Javadoc on large private methods, default in switch, declaration order & others
- Update path exclusions in CodeClimate config to match newly renamed classes (e.g. PHPBB -> PhpBB)
  - Create consistency check testing that excluded paths exist as classes
- Fix some trivial violations

src/main/java/fr/xephi/authme/process/login/AsynchronousLogin.java

@@ -96,6 +96,7 @@ public class AsynchronousLogin implements AsynchronousProcess {
      * Checks the precondition for authentication (like user known) and returns
      * the player's {@link PlayerAuth} object.
      *
+     * @param player the player to check
      * @return the PlayerAuth object, or {@code null} if the player doesn't exist or may not log in
      *         (e.g. because he is already logged in)
      */

src/main/java/fr/xephi/authme/process/register/executors/AbstractPasswordRegisterExecutor.java

@@ -17,6 +17,8 @@ import javax.inject.Inject;
 /**
  * Registration executor for registration methods where the password
  * is supplied by the user.
+ *
+ * @param <P> the parameters type
  */
 abstract class AbstractPasswordRegisterExecutor<P extends AbstractPasswordRegisterParams>
     implements RegistrationExecutor<P> {

src/main/java/fr/xephi/authme/process/register/executors/RegistrationExecutor.java

@@ -4,6 +4,8 @@ import fr.xephi.authme.data.auth.PlayerAuth;
 
 /**
  * Performs the registration action.
+ *
+ * @param <P> the registration parameters type
  */
 public interface RegistrationExecutor<P extends RegistrationParameters> {
 

src/main/java/fr/xephi/authme/process/register/executors/RegistrationMethod.java

@@ -8,6 +8,8 @@ package fr.xephi.authme.process.register.executors;
  * classes which perform this registration method. This is essentially a <i>typed enum</i>
  * as passing a constant of this class along with a parameters object to a method can
  * be restricted to the correct parameters type.
+ *
+ * @param <P> the registration parameters type the method uses
  */
 public final class RegistrationMethod<P extends RegistrationParameters> {