Fixes covers tests

tests/Fixtures/Covers/CoversClass1.php

@@ -0,0 +1,9 @@
+<?php
+
+namespace Tests\Fixtures\Covers;
+
+class CoversClass1 {
+    public function foo() {
+
+    }
+}

tests/Fixtures/Covers/CoversClass2.php

@@ -0,0 +1,5 @@
+<?php
+
+namespace Tests\Fixtures\Covers;
+
+class CoversClass2 {}

tests/Fixtures/Covers/CoversClass3.php

@@ -0,0 +1,5 @@
+<?php
+
+namespace Tests\Fixtures\Covers;
+
+class CoversClass3 {}