Various code cleanup

app/Handlers/Events/BillEventHandler.php

@@ -44,6 +44,7 @@ class BillEventHandler
         Log::debug(sprintf('Now in %s', __METHOD__));
 
         $bill       = $event->bill;
+        /** @var bool $preference */
         $preference = Preferences::getForUser($bill->user, 'notification_bill_reminder', true)->data;
 
         if (true === $preference) {

app/Handlers/Events/UpdatedGroupEventHandler.php

@@ -125,7 +125,7 @@ class UpdatedGroupEventHandler
             return;
         }
         // first journal:
-        /** @var TransactionJournal $first */
+        /** @var TransactionJournal|null $first */
         $first = $group->transactionJournals()
                        ->orderBy('transaction_journals.date', 'DESC')
                        ->orderBy('transaction_journals.order', 'ASC')

app/Handlers/Events/UserEventHandler.php

@@ -143,7 +143,7 @@ class UserEventHandler
                 throw new FireflyException('Email address can no longer be used for registrations.');
             }
         }
-        /** @var UserRole $role */
+        /** @var UserRole|null $role */
         $role = UserRole::where('title', UserRole::OWNER)->first();
         if (null === $role) {
             throw new FireflyException('The user role is unexpectedly empty. Did you run all migrations?');
@@ -366,6 +366,7 @@ class UserEventHandler
             ];
         }
         $preference = array_values($preference);
+        /** @var bool $send */
         $send       = app('preferences')->getForUser($user, 'notification_user_login', true)->data;
         app('preferences')->setForUser($user, 'login_ip_history', $preference);