Mark classes as @final

src/BinCommand.php

@@ -26,6 +26,9 @@
 use function sprintf;
 use const GLOB_ONLYDIR;
 
+/**
+ * @final Will be final in 2.x.
+ */
 class BinCommand extends BaseCommand
 {
     private const ALL_NAMESPACES = 'all';

src/CommandProvider.php

@@ -6,6 +6,9 @@
 
 use Composer\Plugin\Capability\CommandProvider as CommandProviderCapability;
 
+/**
+ * @final Will be final in 2.x.
+ */
 class CommandProvider implements CommandProviderCapability
 {
     public function getCommands(): array

src/ConfigFactory.php

@@ -7,12 +7,14 @@
 use Composer\Config as ComposerConfig;
 use Composer\Factory;
 use Composer\Json\JsonFile;
+use Composer\Json\JsonValidationException;
+use Seld\JsonLint\ParsingException;
 
 final class ConfigFactory
 {
     /**
-     * @throws \Composer\Json\JsonValidationException
-     * @throws \Seld\JsonLint\ParsingException
+     * @throws JsonValidationException
+     * @throws ParsingException
      */
     public static function createConfig(): ComposerConfig
     {

src/Plugin.php

@@ -21,6 +21,9 @@
 use function array_filter;
 use function array_keys;
 
+/**
+ * @final Will be final in 2.x.
+ */
 class Plugin implements PluginInterface, Capable, EventSubscriberInterface
 {
     /**