Revert "refactor: removed interfaces for abstract classes"

This reverts commit 5ba2dd7.

Author: petrknap

src/Coder/Coder.php

@@ -8,9 +8,6 @@
 
 abstract class Coder implements CoderInterface
 {
-    /**
-     * @throws Exception\CoderCouldNotEncodeData
-     */
     public function encode(string $decoded): string
     {
         try {
@@ -23,9 +20,6 @@ public function encode(string $decoded): string
         }
     }
 
-    /**
-     * @throws Exception\CoderCouldNotDecodeData
-     */
     public function decode(string $encoded): string
     {
         try {

src/Coder/CoderInterface.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PetrKnap\Binary\Coder;
+
+interface CoderInterface
+{
+    /**
+     * @throws Exception\CoderCouldNotEncodeData
+     */
+    public function encode(string $decoded): string;
+
+    /**
+     * @throws Exception\CoderCouldNotDecodeData
+     */
+    public function decode(string $encoded): string;
+}

src/Serializer/Serializer.php

@@ -8,9 +8,6 @@
 
 abstract class Serializer implements SerializerInterface
 {
-    /**
-     * @throws Exception\SerializerCouldNotSerializeData
-     */
     public function serialize(mixed $serializable): string
     {
         try {
@@ -23,9 +20,6 @@ public function serialize(mixed $serializable): string
         }
     }
 
-    /**
-     * @throws Exception\SerializerCouldNotUnserializeData
-     */
     public function unserialize(string $serialized): mixed
     {
         try {

src/Serializer/SerializerInterface.php

@@ -0,0 +1,18 @@
+<?php
+
+declare(strict_types=1);
+
+namespace PetrKnap\Binary\Serializer;
+
+interface SerializerInterface
+{
+    /**
+     * @throws Exception\SerializerCouldNotSerializeData
+     */
+    public function serialize(mixed $serializable): string;
+
+    /**
+     * @throws Exception\SerializerCouldNotUnserializeData
+     */
+    public function unserialize(string $serialized): mixed;
+}