diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..f45219c
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,2 @@
+/vendor/
+/.idea
\ No newline at end of file
diff --git a/composer.json b/composer.json
new file mode 100644
index 0000000..83f091a
--- /dev/null
+++ b/composer.json
@@ -0,0 +1,18 @@
+{
+    "name": "mrsuh/mongo-odm",
+    "description": "mongo odm",
+    "type": "library",
+    "require": {
+        "mongodb/mongodb": "^1.1"
+    },
+    "autoload": {
+        "psr-4": { "ODM\\": "src/" }
+    },
+    "license": "MIT",
+    "authors": [
+        {
+            "name": "Sukhachev Anton",
+            "email": "mrsuh6@gmail.com"
+        }
+    ]
+}
diff --git a/src/DBAL.php b/src/DBAL.php
new file mode 100644
index 0000000..8a4f861
--- /dev/null
+++ b/src/DBAL.php
@@ -0,0 +1,51 @@
+<?php
+
+namespace ODM;
+
+use MongoDB\Client;
+
+class DBAL
+{
+    private $db;
+
+    public function __construct($host, $port, $db_name)
+    {
+        $this->db = (new Client("mongodb://$host:$port"))->$db_name;
+    }
+
+    public function insert($table_name, array $data)
+    {
+        return $this->db->$table_name->insertOne($data);
+    }
+
+    public function insertMany($table_name, array $data)
+    {
+        return $this->db->$table_name->insertMany($data);
+    }
+
+    public function update($table_name, array $filter, array $data)
+    {
+        return $this->db->$table_name->updateOne($filter, ['$set' => $data]);
+    }
+
+    public function delete($table_name, array $filter)
+    {
+        return $this->db->$table_name->deleteOne($filter);
+    }
+
+    public function find($table_name, array $filter, array $options = [])
+    {
+        return $this->db->$table_name->find($filter, $options);
+    }
+
+    public function findOne($table_name, array $filter, array $options = [])
+    {
+        return $this->db->$table_name->findOne($filter, $options);
+    }
+
+    public function drop($table_name)
+    {
+        return $this->db->$table_name->drop();
+    }
+}
+
diff --git a/src/Document/Document.php b/src/Document/Document.php
new file mode 100644
index 0000000..eaea05f
--- /dev/null
+++ b/src/Document/Document.php
@@ -0,0 +1,8 @@
+<?php
+
+namespace ODM\Document;
+
+class Document
+{
+
+}
\ No newline at end of file
diff --git a/src/DocumentMapper/DataMapper.php b/src/DocumentMapper/DataMapper.php
new file mode 100644
index 0000000..1098aa8
--- /dev/null
+++ b/src/DocumentMapper/DataMapper.php
@@ -0,0 +1,151 @@
+<?php
+
+namespace ODM\DocumentMapper;
+
+use ODM\DBAL;
+use ODM\Document\Document;
+
+class DataMapper
+{
+    private $dbal;
+
+    private $table_name;
+    private $class;
+
+    const MONGO_ID = '_id';
+    const ID       = 'id';
+
+    public function __construct(DBAL $dbal, $class)
+    {
+        $this->dbal       = $dbal;
+        $this->class      = $class;
+        $path             = explode('\\', $class);
+        $this->table_name = mb_strtolower($this->camelCaseToSnake(array_pop($path)));
+    }
+
+    public function insert(Document $obj)
+    {
+        $data = $this->objToArray($obj);
+
+        if (array_key_exists(self::MONGO_ID, $data) && empty($data[self::MONGO_ID])) {
+            unset($data[self::MONGO_ID]);
+        }
+
+        $result = $this->dbal->insert($this->table_name, $data);
+
+        return $obj->setId($result->getInsertedId());
+    }
+
+    public function update(Document $obj)
+    {
+        $data = $this->objToArray($obj);
+        unset($data[self::MONGO_ID]);
+
+        $this->dbal->update($this->table_name, [self::MONGO_ID => $obj->getId()], $data);
+
+        return $obj;
+    }
+
+    public function delete(Document $obj)
+    {
+        return $this->dbal->delete($this->table_name, [self::MONGO_ID => $obj->getId()]);
+    }
+
+    public function drop()
+    {
+        return $this->dbal->drop($this->table_name);
+    }
+
+    public function find(array $filter = [], array $options = [])
+    {
+        if (array_key_exists(self::ID, $filter)) {
+            $filter[self::MONGO_ID] = $filter[self::ID];
+            unset($filter[self::ID]);
+        }
+
+        $result = [];
+        foreach ($this->dbal->find($this->table_name, $filter, $options) as $r) {
+            $result[] = $this->mapObj(new $this->class, $r);
+        }
+
+        return $result;
+    }
+
+    public function findOne(array $filter = [], array $options = [])
+    {
+        if (array_key_exists(self::ID, $filter)) {
+            $filter[self::MONGO_ID] = $filter[self::ID];
+            unset($filter[self::ID]);
+        }
+
+        $data = $this->dbal->findOne($this->table_name, $filter, $options);
+
+        return empty($data) ? null : $this->mapObj(new $this->class, $data);
+    }
+
+    private function mapObj($obj, $data)
+    {
+        $methods = get_class_methods(get_class($obj));
+
+        foreach ((array)$data as $field => $value) {
+
+            $field_name = self::MONGO_ID === (string)$field ? self::ID : $field;
+            $value      = self::MONGO_ID === (string)$field ? (string)$value : $value;
+            $value      = is_object($value) ? (array)$value : $value;
+
+            if (null === $value) {
+                continue;
+            }
+
+            $setter = 'set' . $this->snakeToCamelCase($field_name);
+
+            if (!in_array($setter, $methods)) {
+                continue;
+            }
+
+            $obj->$setter($value);
+        }
+
+        return $obj;
+    }
+
+    private function snakeToCamelCase($input)
+    {
+        $new = [];
+        foreach (explode('_', $input) as $key => $word) {
+            $new[] = ucfirst($word);
+        }
+
+        return implode('', $new);
+    }
+
+    private function camelCaseToSnake($input)
+    {
+        preg_match_all('!([A-Z][A-Z0-9]*(?=$|[A-Z][a-z0-9])|[A-Za-z][a-z0-9]+)!', $input, $matches);
+        $res = $matches[0];
+        foreach ($res as &$match) {
+            $match = $match == strtoupper($match) ? strtolower($match) : lcfirst($match);
+        }
+
+        return implode('_', $res);
+    }
+
+    public function objToArray($obj)
+    {
+        $data    = [];
+        $reflect = new \ReflectionClass($obj);
+        foreach ($reflect->getProperties() as $prop) {
+            $getter = 'get' . $this->snakeToCamelCase($prop->getName());
+
+            if ($prop->getName() === self::ID) {
+                $prop_name = self::MONGO_ID;
+            } else {
+                $prop_name = $prop->getName();
+            }
+
+            $data[$prop_name] = $obj->$getter();
+        }
+
+        return $data;
+    }
+}
\ No newline at end of file
diff --git a/src/DocumentMapper/DataMapperFactory.php b/src/DocumentMapper/DataMapperFactory.php
new file mode 100644
index 0000000..b30e68a
--- /dev/null
+++ b/src/DocumentMapper/DataMapperFactory.php
@@ -0,0 +1,20 @@
+<?php
+
+namespace ODM\DocumentMapper;
+
+use ODM\DBAL;
+
+class DataMapperFactory
+{
+    private $dbal;
+
+    public function __construct(DBAL $dbal)
+    {
+        $this->dbal = $dbal;
+    }
+
+    public function init($class)
+    {
+        return new DataMapper($this->dbal, $class);
+    }
+}
\ No newline at end of file