diff --git a/src/Responder.php b/src/Responder.php
index 8bd3d9b..da40b0f 100644
--- a/src/Responder.php
+++ b/src/Responder.php
@@ -5,7 +5,7 @@
 use Illuminate\Support\Collection;
 use Illuminate\Database\Eloquent\Model;
 use Illuminate\Contracts\Support\Responsable;
-use Signifly\Responder\Support\ModelResolver;
+use Signifly\Responder\Contracts\ModelResolver;
 use Signifly\Responder\Responses\ModelResponse;
 use Signifly\Responder\Responses\DefaultResponse;
 use Signifly\Responder\Contracts\ResourceResolver;
@@ -16,10 +16,10 @@
 
 class Responder implements Contract
 {
-    /** @var \Signifly\Responder\Support\ModelResolver */
+    /** @var \Signifly\Responder\Contracts\ModelResolver */
     protected $modelResolver;
 
-    /** @var \Signifly\Responder\Support\ResourceResolver */
+    /** @var \Signifly\Responder\Contracts\ResourceResolver */
     protected $resourceResolver;
 
     public function __construct(
@@ -62,7 +62,7 @@ public function respond($data): Responsable
      */
     protected function respondForCollection(Collection $data)
     {
-        $modelClass = $model ?? $this->modelResolver->resolve($data, 'collection');
+        $modelClass = $this->modelResolver->resolve($data, 'collection');
         $resourceClass = $this->resourceResolver->resolve($modelClass);
 
         return new CollectionResponse($data, $resourceClass);
@@ -90,7 +90,7 @@ protected function respondForModel(Model $model)
      */
     protected function respondForPaginator(LengthAwarePaginator $data)
     {
-        $modelClass = $model ?? $this->modelResolver->resolve($data, 'paginator');
+        $modelClass = $this->modelResolver->resolve($data, 'paginator');
         $resourceClass = $this->resourceResolver->resolve($modelClass);
 
         return new PaginatorResponse($data, $resourceClass);
diff --git a/src/Responses/Response.php b/src/Responses/Response.php
index db6d8be..b0c4abe 100644
--- a/src/Responses/Response.php
+++ b/src/Responses/Response.php
@@ -6,20 +6,4 @@
 
 abstract class Response implements Responsable
 {
-    /**
-     * Get the http resource class for a given model.
-     *
-     * @param  string $model
-     * @return string
-     */
-    protected function getResourceClassFor(string $model)
-    {
-        $resourceClass = ResourceResolver::forModel($model);
-
-        if (config('responder.force_resources') && ! class_exists($resourceClass)) {
-            throw new Exception(sprintf('Could not find a resource for %s', $model));
-        }
-
-        return $resourceClass;
-    }
 }
diff --git a/src/Support/ModelResolver.php b/src/Support/ModelResolver.php
index 169a58c..41432e8 100644
--- a/src/Support/ModelResolver.php
+++ b/src/Support/ModelResolver.php
@@ -6,11 +6,20 @@
 use Illuminate\Support\Arr;
 use Illuminate\Support\Str;
 use InvalidArgumentException;
+use Illuminate\Support\Collection;
 use Illuminate\Database\Eloquent\Model;
+use Illuminate\Contracts\Pagination\LengthAwarePaginator;
 use Signifly\Responder\Contracts\ModelResolver as Contract;
 
 class ModelResolver implements Contract
 {
+    /**
+     * Resolve the model from data for a given type.
+     *
+     * @param  mixed $data
+     * @param  string $type
+     * @return string|null
+     */
     public function resolve($data, string $type): ?string
     {
         $methodName = 'resolveFor'.Str::studly($type);
@@ -23,6 +32,12 @@ public function resolve($data, string $type): ?string
         );
     }
 
+    /**
+     * Guard against invalid item.
+     *
+     * @param  mixed $item
+     * @return void
+     */
     protected function guardAgainstInvalidItem($item): void
     {
         if (! $item instanceof Model) {
@@ -30,7 +45,13 @@ protected function guardAgainstInvalidItem($item): void
         }
     }
 
-    protected function resolveForArray($data): ?string
+    /**
+     * Resolve for an array.
+     *
+     * @param  array  $data
+     * @return string|null
+     */
+    protected function resolveForArray(array $data): ?string
     {
         if (empty($data)) {
             return null;
@@ -41,7 +62,13 @@ protected function resolveForArray($data): ?string
         return $this->resolveItem($item);
     }
 
-    protected function resolveForCollection($data): ?string
+    /**
+     * Resolve for a collection.
+     *
+     * @param  \Illuminate\Support\Collection $data
+     * @return string|null
+     */
+    protected function resolveForCollection(Collection $data): ?string
     {
         if ($data->isEmpty()) {
             return null;
@@ -55,10 +82,10 @@ protected function resolveForCollection($data): ?string
     /**
      * Resolve for paginator.
      *
-     * @param  [type] $data
-     * @return string
+     * @param  \Illuminate\Contracts\Pagination\LengthAwarePaginator $data
+     * @return string|null
      */
-    protected function resolveForPaginator($data): ?string
+    protected function resolveForPaginator(LengthAwarePaginator $data): ?string
     {
         if ($data->isEmpty()) {
             return null;
diff --git a/src/Support/ResourceResolver.php b/src/Support/ResourceResolver.php
index d10df89..403bb5b 100644
--- a/src/Support/ResourceResolver.php
+++ b/src/Support/ResourceResolver.php
@@ -2,10 +2,17 @@
 
 namespace Signifly\Responder\Support;
 
+use Signifly\Responder\Exceptions\ResourceNotFoundException;
 use Signifly\Responder\Contracts\ResourceResolver as Contract;
 
 class ResourceResolver implements Contract
 {
+    /**
+     * Resolve a resource from a model class.
+     *
+     * @param  string $model
+     * @return string|null
+     */
     public function resolve(string $model): ?string
     {
         if (empty($model)) {