diff --git a/src/DoctrineFacade.php b/src/DoctrineFacade.php
new file mode 100644
index 0000000..21eb314
--- /dev/null
+++ b/src/DoctrineFacade.php
@@ -0,0 +1,79 @@
+<?php
+namespace Weirdan\DoctrinePsalmPlugin;
+
+use Doctrine\Common\Persistence\Mapping\ClassMetadata;
+use Doctrine\Common\Persistence\Mapping\StaticReflectionService;
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\Tools\Setup;
+use InvalidArgumentException;
+use SimpleXMLElement;
+
+class DoctrineFacade
+{
+    /** @var EntityManager */
+    private $em;
+
+    private function __construct(EntityManager $em)
+    {
+        $this->em = $em;
+    }
+
+    /**
+     * @return non-empty-array<int,string>
+     * @throws InvalidArgumentException when encountering unreadable config
+     */
+    private static function loadPaths(SimpleXMLElement $container): array
+    {
+        if (!isset($container->path) || !$container->path instanceof SimpleXMLElement) {
+            throw new InvalidArgumentException('expecting at least one <path> element');
+        }
+
+        $paths = [];
+
+        /** @var SimpleXMLElement $path */
+        foreach ($container->path as $path) {
+            $paths[] = (string) $path;
+        }
+
+        if (empty($paths)) {
+            throw new InvalidArgumentException('expecting at least one <path> element');
+        }
+
+        return $paths;
+    }
+
+    /**
+     * @throws InvalidArgumentException when encountering unreadable config
+     */
+    public static function load(SimpleXMLElement $config): self
+    {
+        if (!isset($config->doctrine) || !$config->doctrine instanceof SimpleXMLElement) {
+            throw new InvalidArgumentException('expecting <doctrine> subelement');
+        }
+
+        $doctrine = $config->doctrine;
+
+        if (isset($doctrine->annotations) && $doctrine->annotations instanceof SimpleXMLElement) {
+            $paths = self::loadPaths($doctrine->annotations);
+            $doctrineConfig = Setup::createAnnotationMetadataConfiguration($paths, true);
+        } elseif (isset($doctrine->yaml) && $doctrine->yaml instanceof SimpleXMLElement) {
+            $paths = self::loadPaths($doctrine->yaml);
+            $doctrineConfig = Setup::createYAMLMetadataConfiguration($paths, true);
+        } elseif (isset($doctrine->xml) && $doctrine->xml instanceof SimpleXMLElement) {
+            $paths = self::loadPaths($doctrine->xml);
+            $doctrineConfig = Setup::createXMLMetadataConfiguration($paths, true);
+        } else {
+            throw new InvalidArgumentException('expecting one of <annotations>, <yaml>, <xml> subelements');
+        }
+
+        $em = EntityManager::create(['driverClass' => DummyDriver::class], $doctrineConfig);
+        $em->getMetadataFactory()->setReflectionService(new StaticReflectionService());
+        return new self($em);
+    }
+
+    /** @param class-string $class */
+    public function getClassMetadata(string $class): ClassMetadata
+    {
+        return $this->em->getClassMetadata($class);
+    }
+}
diff --git a/src/DummyDriver.php b/src/DummyDriver.php
new file mode 100644
index 0000000..0a3ca74
--- /dev/null
+++ b/src/DummyDriver.php
@@ -0,0 +1,34 @@
+<?php
+namespace Weirdan\DoctrinePsalmPlugin;
+
+use BadMethodCallException;
+use Doctrine\DBAL\Connection;
+use Doctrine\DBAL\Driver;
+
+class DummyDriver implements Driver
+{
+    public function connect(array $params, $username = null, $password = null, array $driverOptions = [])
+    {
+        throw new BadMethodCallException();
+    }
+
+    public function getDatabasePlatform()
+    {
+        throw new BadMethodCallException();
+    }
+
+    public function getSchemaManager(Connection $conn)
+    {
+        throw new BadMethodCallException();
+    }
+
+    public function getName()
+    {
+        return 'dummy';
+    }
+
+    public function getDatabase(Connection $conn)
+    {
+        throw new BadMethodCallException();
+    }
+}
diff --git a/src/Hooks/EntityManager/Find.php b/src/Hooks/EntityManager/Find.php
new file mode 100644
index 0000000..80c2a2d
--- /dev/null
+++ b/src/Hooks/EntityManager/Find.php
@@ -0,0 +1,69 @@
+<?php
+namespace Weirdan\DoctrinePsalmPlugin\Hooks\EntityManager;
+
+use Doctrine\ORM\EntityManager;
+use Doctrine\ORM\Mapping\MappingException;
+use Doctrine\Common\Persistence\Mapping\MappingException as CommonMappingException;
+use Psalm\CodeLocation;
+use Psalm\Context;
+use Psalm\IssueBuffer;
+use Psalm\Issue\InvalidArgument;
+use Psalm\Plugin\Hook\MethodReturnTypeProviderInterface;
+use Psalm\StatementsSource;
+use Psalm\Type;
+use Psalm\Type\Atomic;
+use Weirdan\DoctrinePsalmPlugin\Plugin;
+
+class Find implements MethodReturnTypeProviderInterface
+{
+    public static function getClassLikeNames(): array
+    {
+        return [
+            EntityManager::class
+        ];
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    public static function getMethodReturnType(
+        StatementsSource $source,
+        string $fqClasslikeName,
+        string $methodNameLc,
+        array $callArgs,
+        Context $context,
+        CodeLocation $codeLocation,
+        array $templateTypeParameters = null,
+        string $calledFqClasslikeName = null,
+        string $calledMethodNameLc = null
+    ): ?Type\Union {
+        if ('find' !== $methodNameLc) {
+            return null;
+        }
+
+        if (!isset($callArgs[0])) {
+            return null;
+        }
+
+        /** @var Type\Union $potentialEntityType */
+        $potentialEntityType = $callArgs[0]->value->inferredType;
+        $methodId = ($calledFqClasslikeName ?? $fqClasslikeName) . '::' . ($calledMethodNameLc ?? $methodNameLc);
+        /** @var Atomic $type */
+        foreach ($potentialEntityType->getTypes() as $type) {
+            if ($type instanceof Atomic\TLiteralClassString) {
+                /** @var class-string */
+                $className = $type->value;
+                try {
+                    Plugin::doctrine()->getClassMetadata($className);
+                } catch (CommonMappingException | MappingException $e) {
+                    IssueBuffer::accepts(new InvalidArgument(
+                        'Argument 1 of ' . $methodId . ' expects entity class, '
+                        . 'non-entity ' . $type->getKey() . ' given',
+                        new CodeLocation($source, $callArgs[0])
+                    ));
+                }
+            }
+        }
+        return null;
+    }
+}
diff --git a/src/Plugin.php b/src/Plugin.php
index 78c45cf..2a67680 100644
--- a/src/Plugin.php
+++ b/src/Plugin.php
@@ -1,24 +1,60 @@
 <?php
 namespace Weirdan\DoctrinePsalmPlugin;
 
-use SimpleXMLElement;
 use Psalm\Plugin\PluginEntryPointInterface;
 use Psalm\Plugin\RegistrationInterface;
+use RuntimeException;
+use SimpleXMLElement;
 
 class Plugin implements PluginEntryPointInterface
 {
+    /** @var ?DoctrineFacade */
+    private static $doctrine = null;
+
     /** @return void */
     public function __invoke(RegistrationInterface $psalm, ?SimpleXMLElement $config = null)
     {
+        if ($this->loadConfiguration($config)) {
+            $this->loadHooks($psalm);
+        }
+
         $stubs = $this->getStubFiles();
         foreach ($stubs as $file) {
             $psalm->addStubFile($file);
         }
     }
 
+    private function loadHooks(RegistrationInterface $psalm): void
+    {
+        foreach ([
+            Hooks\EntityManager\Find::class
+        ] as $class) {
+            class_exists($class, true);
+            $psalm->registerHooksFromClass($class);
+        }
+    }
+
     /** @return string[] */
     private function getStubFiles(): array
     {
         return glob(__DIR__ . '/' . '../stubs/*\\.php');
     }
+
+    private function loadConfiguration(?SimpleXMLElement $config): bool
+    {
+        if (!$config) {
+            // TODO: add warning
+            return false;
+        }
+        self::$doctrine = DoctrineFacade::load($config);
+        return true;
+    }
+
+    public static function doctrine(): DoctrineFacade
+    {
+        if (null === self::$doctrine) {
+            throw new RuntimeException('Doctrine unavailable, this method is not expected to be called');
+        }
+        return self::$doctrine;
+    }
 }
diff --git a/tests/_support/Helper/Acceptance.php b/tests/_support/Helper/Acceptance.php
index 82e6f15..0053e7f 100644
--- a/tests/_support/Helper/Acceptance.php
+++ b/tests/_support/Helper/Acceptance.php
@@ -1,9 +1,46 @@
 <?php
 namespace Weirdan\DoctrinePsalmPlugin\Tests\Helper;
 
+use Codeception\Exception\ModuleRequireException;
+use Codeception\Module\Filesystem;
+use Weirdan\Codeception\Psalm;
+
 // here you can define custom actions
 // all public methods declared in helper class will be available in $I
 
 class Acceptance extends \Codeception\Module
 {
+    /** @var ?Filesystem */
+    private $fs = null;
+    /**
+     * @Given I have the following mapping for :class :mapping
+     * @return void
+     */
+    public function iHaveTheFollowingMappingForC(string $class, string $mapping)
+    {
+        /**
+         * @psalm-suppress MixedAssignment
+         * @psalm-suppress InvalidArgument
+         */
+        $defaultFile = $this->getModule('\\' . Psalm\Module::class)->_getConfig('default_file');
+        assert(is_string($defaultFile));
+
+        $dir = dirname($defaultFile) . '/mapping';
+        @mkdir($dir, 0755, true);
+
+        $filename = $dir . '/' . str_replace('\\', '.', $class) . '.dcm.xml';
+        $this->fs()->writeToFile($filename, $mapping);
+    }
+
+    private function fs(): Filesystem
+    {
+        if (null === $this->fs) {
+            $fs = $this->getModule('Filesystem');
+            if (!$fs instanceof Filesystem) {
+                throw new ModuleRequireException($this, 'Needs Filesystem module');
+            }
+            $this->fs = $fs;
+        }
+        return $this->fs;
+    }
 }
diff --git a/tests/acceptance/EntityManager.feature b/tests/acceptance/EntityManager.feature
index 7f37b8a..6948ec7 100644
--- a/tests/acceptance/EntityManager.feature
+++ b/tests/acceptance/EntityManager.feature
@@ -12,17 +12,35 @@ Feature: EntityManager
           <directory name="."/>
         </projectFiles>
         <plugins>
-          <pluginClass class="Weirdan\DoctrinePsalmPlugin\Plugin" />
+          <pluginClass class="Weirdan\DoctrinePsalmPlugin\Plugin">
+            <doctrine>
+              <xml>
+                <path>mapping</path>
+              </xml>
+            </doctrine>
+          </pluginClass>
         </plugins>
       </psalm>
       """
+    And I have the following mapping for "C"
+      """
+      <?xml version="1.0"?>
+      <doctrine-mapping
+        xmlns="http://doctrine-project.org/schemas/orm/doctrine-mapping"
+        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://doctrine-project.org/schemas/orm/doctrine-mapping
+                            https://www.doctrine-project.org/schemas/orm/doctrine-mapping.xsd">
+        <entity name="C" table="c">
+        </entity>
+      </doctrine-mapping>
+      """
     And I have the following code preamble
       """
       <?php
       use Doctrine\ORM\EntityRepository;
       use Doctrine\ORM\EntityManager;
 
-      interface I {}
+      class C {}
 
       /**
        * @psalm-suppress InvalidReturnType
@@ -36,12 +54,12 @@ Feature: EntityManager
   Scenario: EntityManager returns specialized EntityRepository
     Given I have the following code
       """
-      atan(em()->getRepository(I::class));
+      atan(em()->getRepository(C::class));
       """
     When I run Psalm
     Then I see these errors
       | Type            | Message                                                                     |
-      | InvalidArgument | Argument 1 of atan expects float, Doctrine\ORM\EntityRepository<I> provided |
+      | InvalidArgument | Argument 1 of atan expects float, Doctrine\ORM\EntityRepository<C> provided |
     And I see no other errors
 
   @EntityManager::getRepository
@@ -60,12 +78,24 @@ Feature: EntityManager
   Scenario: Finding an entity
     Given I have the following code
       """
-      atan(em()->find(I::class, 1));
+      atan(em()->find(C::class, 1));
       """
     When I run Psalm
     Then I see these errors
       | Type            | Message                                            |
-      | InvalidArgument | Argument 1 of atan expects float, null\|I provided |
+      | InvalidArgument | Argument 1 of atan expects float, null\|C provided |
+    And I see no other errors
+
+  @EntityManager::find
+  Scenario: Finding a non-entity
+    Given I have the following code
+    """
+    em()->find(InvalidArgumentException::class, 1);
+    """
+    When I run Psalm
+    Then I see these errors
+      | Type            | Message                                                                                                                      |
+      | InvalidArgument | Argument 1 of Doctrine\ORM\EntityManager::find expects entity class, non-entity class-string(InvalidArgumentException) given |
     And I see no other errors
 
   @EntityManager::find
@@ -84,12 +114,12 @@ Feature: EntityManager
   Scenario: Getting a reference
     Given I have the following code
       """
-      atan(em()->getReference(I::class, 1));
+      atan(em()->getReference(C::class, 1));
       """
     When I run Psalm
     Then I see these errors
       | Type            | Message                                      |
-      | InvalidArgument | Argument 1 of atan expects float, I provided |
+      | InvalidArgument | Argument 1 of atan expects float, C provided |
     And I see no other errors
 
   @EntityManager::getReference