Expand tests, do code cleanup.

app/Support/Import/Configuration/Spectre/InputMandatory.php

@@ -22,6 +22,7 @@ class InputMandatory implements ConfigurationInterface
      * Get the data necessary to show the configuration screen.
      *
      * @return array
+     * @throws FireflyException
      */
     public function getData(): array
     {
@@ -56,7 +57,7 @@ class InputMandatory implements ConfigurationInterface
     /**
      * @param ImportJob $job
      *
-     * @return ConfigurationInterface
+     * @return void
      */
     public function setJob(ImportJob $job)
     {
@@ -69,6 +70,7 @@ class InputMandatory implements ConfigurationInterface
      * @param array $data
      *
      * @return bool
+     * @throws FireflyException
      */
     public function storeConfiguration(array $data): bool
     {

app/Support/Import/Configuration/Spectre/SelectCountry.php

@@ -13,6 +13,9 @@ use FireflyIII\Support\Import\Configuration\ConfigurationInterface;
  */
 class SelectCountry implements ConfigurationInterface
 {
+    /**
+     * @var array
+     */
     public static $allCountries
         = [
             'AF' => 'Afghanistan',
@@ -302,7 +305,7 @@ class SelectCountry implements ConfigurationInterface
     /**
      * @param ImportJob $job
      *
-     * @return ConfigurationInterface
+     * @return void
      */
     public function setJob(ImportJob $job)
     {

app/Support/Import/Configuration/Spectre/SelectProvider.php

@@ -50,7 +50,7 @@ class SelectProvider implements ConfigurationInterface
     /**
      * @param ImportJob $job
      *
-     * @return ConfigurationInterface
+     * @return void
      */
     public function setJob(ImportJob $job)
     {