diff --git a/lib/Command/BoardImport.php b/lib/Command/BoardImport.php
index ba4ad8a72..2c825ae9e 100644
--- a/lib/Command/BoardImport.php
+++ b/lib/Command/BoardImport.php
@@ -72,20 +72,6 @@ class BoardImport extends Command {
 		;
 	}
 
-	/**
-	 * @inheritDoc
-	 *
-	 * @return void
-	 */
-	protected function interact(InputInterface $input, OutputInterface $output) {
-		$this->boardImportCommandService
-			->setInput($input)
-			->setOutput($output)
-			->setSystem($input->getOption('system'))
-			->setConfigInstance($input->getOption('config'))
-			->validate();
-	}
-
 	/**
 	 * @param InputInterface $input
 	 * @param OutputInterface $output
@@ -97,6 +83,7 @@ class BoardImport extends Command {
 			->boardImportCommandService
 			->setInput($input)
 			->setOutput($output)
+			->setCommand($this)
 			->import();
 		$output->writeln('Done!');
 		return 0;
diff --git a/lib/Controller/BoardImportApiController.php b/lib/Controller/BoardImportApiController.php
index febad393b..b6c32183f 100644
--- a/lib/Controller/BoardImportApiController.php
+++ b/lib/Controller/BoardImportApiController.php
@@ -57,7 +57,6 @@ class BoardImportApiController extends ApiController {
 		$config->owner = $this->userId;
 		$this->boardImportService->setConfigInstance($config);
 		$this->boardImportService->setData(json_decode(json_encode($data)));
-		$this->boardImportService->validate();
 		$this->boardImportService->import();
 		return new DataResponse($this->boardImportService->getBoard(), Http::STATUS_OK);
 	}
diff --git a/lib/Service/ABoardImportService.php b/lib/Service/ABoardImportService.php
index ef36fb8e3..614c31225 100644
--- a/lib/Service/ABoardImportService.php
+++ b/lib/Service/ABoardImportService.php
@@ -63,7 +63,12 @@ abstract class ABoardImportService {
 
 	abstract public function assignCardsToLabels(): void;
 
-	abstract public function validateUsers(): void;
+	/**
+	 * Configure import service
+	 *
+	 * @return void
+	 */
+	abstract public function bootstrap(): void;
 
 	public function setImportService(BoardImportService $service): void {
 		$this->boardImportService = $service;
diff --git a/lib/Service/BoardImportCommandService.php b/lib/Service/BoardImportCommandService.php
index d286b8a30..bff49e5a0 100644
--- a/lib/Service/BoardImportCommandService.php
+++ b/lib/Service/BoardImportCommandService.php
@@ -48,14 +48,9 @@ class BoardImportCommandService extends BoardImportService {
 	 */
 	private $output;
 
-	/**
-	 * Define Command instance
-	 *
-	 * @param Command $command
-	 * @return void
-	 */
-	public function setCommand(Command $command): void {
+	public function setCommand(Command $command): self {
 		$this->command = $command;
+		return $this;
 	}
 
 	public function getCommand(): Command {
@@ -80,13 +75,19 @@ class BoardImportCommandService extends BoardImportService {
 		return $this->output;
 	}
 
-	public function validate(): void {
-		$this->validateData();
-		parent::validate();
-	}
-
 	protected function validateConfig(): void {
 		try {
+			$config = $this->getInput()->getOption('config');
+			if (is_string($config)) {
+				if (!is_file($config)) {
+					throw new NotFoundException('Please inform a valid config json file');
+				}
+				$config = json_decode(file_get_contents($config));
+				if (!$config instanceof \stdClass) {
+					throw new NotFoundException('Please inform a valid config json file');
+				}
+				$this->setConfigInstance($config);
+			}
 			parent::validateConfig();
 			return;
 		} catch (NotFoundException $e) {
@@ -104,7 +105,7 @@ class BoardImportCommandService extends BoardImportService {
 				return $answer;
 			});
 			$configFile = $helper->ask($this->getInput(), $this->getOutput(), $question);
-			$this->setConfigInstance($configFile);
+			$config = $this->getInput()->setOption('config', $configFile);
 		} catch (ConflictException $e) {
 			$this->getOutput()->writeln('<error>Invalid config file</error>');
 			$this->getOutput()->writeln(array_map(function (array $v): string {
@@ -114,7 +115,6 @@ class BoardImportCommandService extends BoardImportService {
 			$schemaPath = __DIR__ . '/fixtures/config-' . $this->getSystem() . '-schema.json';
 			$this->getOutput()->writeln(print_r(file_get_contents($schemaPath), true));
 			$this->getInput()->setOption('config', null);
-			$this->setConfigInstance('');
 		}
 		parent::validateConfig();
 		return;
@@ -139,34 +139,41 @@ class BoardImportCommandService extends BoardImportService {
 		return;
 	}
 
-	private function validateData(): self {
-		$filename = $this->getInput()->getOption('data');
-		if (!is_string($filename) || empty($filename) || !is_file($filename)) {
-			$helper = $this->getCommand()->getHelper('question');
-			$question = new Question(
-				'Please inform a valid data json file: ',
-				'data.json'
-			);
-			$question->setValidator(function (string $answer) {
-				if (!is_file($answer)) {
-					throw new \RuntimeException(
-						'Data file not found'
-					);
-				}
-				return $answer;
-			});
-			$data = $helper->ask($this->getInput(), $this->getOutput(), $question);
-			$this->getInput()->setOption('data', $data);
+	protected function validateData(): void {
+		$data = $this->getInput()->getOption('data');
+		if (is_string($data)) {
+			$data = json_decode(file_get_contents($data));
+			if ($data instanceof \stdClass) {
+				$this->setData($data);
+				return;
+			}
 		}
-		$this->setData(json_decode(file_get_contents($filename)));
-		if (!$this->getData()) {
-			$this->getOutput()->writeln('<error>Is not a json file: ' . $filename . '</error>');
-			$this->validateData();
-		}
-		return $this;
+		$helper = $this->getCommand()->getHelper('question');
+		$question = new Question(
+			'Please inform a valid data json file: ',
+			'data.json'
+		);
+		$question->setValidator(function (string $answer) {
+			if (!is_file($answer)) {
+				throw new \RuntimeException(
+					'Data file not found'
+				);
+			}
+			return $answer;
+		});
+		$data = $helper->ask($this->getInput(), $this->getOutput(), $question);
+		$this->getInput()->setOption('data', $data);
+		$this->validateData();
+	}
+
+	public function bootstrap(): void {
+		$this->setSystem($this->getInput()->getOption('system'));
+		parent::bootstrap();
 	}
 
 	public function import(): void {
+		$this->getOutput()->writeln('Starting import...');
+		$this->bootstrap();
 		$this->getOutput()->writeln('Importing board...');
 		$this->importBoard();
 		$this->getOutput()->writeln('Assign users to board...');
diff --git a/lib/Service/BoardImportService.php b/lib/Service/BoardImportService.php
index 49a8bc4f4..a295f12a2 100644
--- a/lib/Service/BoardImportService.php
+++ b/lib/Service/BoardImportService.php
@@ -111,10 +111,10 @@ class BoardImportService {
 		$this->cardMapper = $cardMapper;
 		$this->assignmentMapper = $assignmentMapper;
 		$this->commentsManager = $commentsManager;
-		$this->setData(new \stdClass());
 	}
 
 	public function import(): void {
+		$this->bootstrap();
 		try {
 			$this->importBoard();
 			$this->importAcl();
@@ -129,12 +129,6 @@ class BoardImportService {
 		}
 	}
 
-	public function validate(): void {
-		$this->validateSystem();
-		$this->validateConfig();
-		$this->validateUsers();
-	}
-
 	public function validateSystem(): void {
 		if (!in_array($this->getSystem(), $this->getAllowedImportSystems())) {
 			throw new NotFoundException('Invalid system');
@@ -327,7 +321,7 @@ class BoardImportService {
 		$this->getImportSystem()->importParticipants();
 	}
 
-	final public function setData(\stdClass $data): void {
+	public function setData(\stdClass $data): void {
 		$this->data = $data;
 	}
 
@@ -355,7 +349,7 @@ class BoardImportService {
 	 * @param string $configName config name
 	 * @return mixed
 	 */
-	public function getConfig(string $configName = null) {
+	public function getConfig(string $configName) {
 		if (!property_exists($this->config, $configName)) {
 			return;
 		}
@@ -363,19 +357,10 @@ class BoardImportService {
 	}
 
 	/**
-	 * @param mixed $config
+	 * @param \stdClass $config
 	 * @return self
 	 */
 	public function setConfigInstance($config): self {
-		if (is_string($config)) {
-			if (!is_file($config)) {
-				throw new NotFoundException('Please inform a valid config json file');
-			}
-			$config = json_decode(file_get_contents($config));
-			if (!is_object($config)) {
-				throw new NotFoundException('Please inform a valid config json file');
-			}
-		}
 		$this->config = $config;
 		return $this;
 	}
@@ -413,7 +398,13 @@ class BoardImportService {
 		$this->setConfig('owner', $owner);
 	}
 
-	public function validateUsers(): void {
-		$this->getImportSystem()->validateUsers();
+	protected function validateData(): void {
+	}
+
+	public function bootstrap(): void {
+		$this->validateSystem();
+		$this->validateConfig();
+		$this->validateData();
+		$this->getImportSystem()->bootstrap();
 	}
 }
diff --git a/lib/Service/BoardImportTrelloService.php b/lib/Service/BoardImportTrelloService.php
index adf8b0abe..1598e20f2 100644
--- a/lib/Service/BoardImportTrelloService.php
+++ b/lib/Service/BoardImportTrelloService.php
@@ -66,6 +66,10 @@ class BoardImportTrelloService extends ABoardImportService {
 		$this->l10n = $l10n;
 	}
 
+	public function bootstrap(): void {
+		$this->validateUsers();
+	}
+
 	public function validateUsers(): void {
 		if (empty($this->getImportService()->getConfig('uidRelation'))) {
 			return;
diff --git a/tests/unit/Service/BoardImportServiceTest.php b/tests/unit/Service/BoardImportServiceTest.php
index a24022370..9d0ccbd6b 100644
--- a/tests/unit/Service/BoardImportServiceTest.php
+++ b/tests/unit/Service/BoardImportServiceTest.php
@@ -76,6 +76,22 @@ class BoardImportServiceTest extends \Test\TestCase {
 			$this->assignmentMapper,
 			$this->commentsManager
 		);
+
+		$this->boardImportService->setSystem('trello');
+
+		$data = json_decode(file_get_contents(__DIR__ . '/../../data/data-trello.json'));
+		$this->boardImportService->setData($data);
+
+		$configInstance = json_decode(file_get_contents(__DIR__ . '/../../data/config-trello.json'));
+		$this->boardImportService->setConfigInstance($configInstance);
+
+		$owner = $this->createMock(IUser::class);
+		$owner
+			->method('getUID')
+			->willReturn('admin');
+		$this->userManager
+			->method('get')
+			->willReturn($owner);
 	}
 
 	public function testImportSuccess() {
@@ -91,25 +107,18 @@ class BoardImportServiceTest extends \Test\TestCase {
 	}
 
 	public function testImportBoard() {
-		$this->boardImportService->setSystem('trello');
-		$data = json_decode(file_get_contents(__DIR__ . '/../../data/data-trello.json'));
-		$this->boardImportService->setData($data);
-		$configInstance = json_decode(file_get_contents(__DIR__ . '/../../data/config-trello.json'));
-		$this->boardImportService->setConfigInstance($configInstance);
-
-		$owner = $this->createMock(IUser::class);
-		$owner
-			->method('getUID')
-			->willReturn('owner');
-		$this->userManager
-			->method('get')
-			->willReturn($owner);
 		$this->boardImportService->validateOwner();
 		$actual = $this->boardImportService->importBoard();
 		$this->assertNull($actual);
 		$board = $this->boardImportService->getBoard();
 		$this->assertEquals('Test Board Name', $board->getTitle());
-		$this->assertEquals('owner', $board->getOwner());
+		$this->assertEquals('admin', $board->getOwner());
 		$this->assertEquals('0800fd', $board->getColor());
 	}
+
+	public function testImportAcl() {
+		$this->markTestIncomplete();
+		$actual = $this->boardImportService->importAcl();
+		$this->assertNull($actual);
+	}
 }