diff --git a/.gitignore b/.gitignore
index 796e3b87..61948b4b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -45,3 +45,4 @@ test.php
 
 phpinfo.php
 vendor/ezyang/htmlpurifier/library/HTMLPurifier/DefinitionCache/*
+*.sqlite3
diff --git a/f_install/sql/err_log.sql b/f_install/sql/err_log.sql
new file mode 100644
index 00000000..cecd3a44
--- /dev/null
+++ b/f_install/sql/err_log.sql
@@ -0,0 +1,12 @@
+BEGIN TRANSACTION;
+CREATE TABLE IF NOT EXISTS `err_log` (
+	`id`	INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT,
+	`date`	TEXT NOT NULL,
+	`err`	TEXT NOT NULL,
+	`errstr`	TEXT NOT NULL,
+	`trace`	TEXT NOT NULL
+);
+CREATE INDEX IF NOT EXISTS `date` ON `err_log` (
+	`date`	DESC
+);
+COMMIT;
diff --git a/src/sammo/FileDB.php b/src/sammo/FileDB.php
new file mode 100644
index 00000000..6ebbd92e
--- /dev/null
+++ b/src/sammo/FileDB.php
@@ -0,0 +1,19 @@
+<?php
+namespace sammo;
+//SQLite + catfan\Medoo
+
+use \Medoo\Medoo;
+
+class FileDB{
+    public static function DB(string $path, ?string $schemaPath = null) : Medoo{
+        //Note: reference count 적용. MySQL의 것과 다르게 동작함.
+        $db = new Medoo([
+            'database_type' => 'sqlite',
+	        'database_file' => $path
+        ]);
+        if($schemaPath){
+            $db->query(\file_get_contents($schemaPath));
+        }
+        return $db;
+    }
+}
\ No newline at end of file