diff --git a/App/Models/Access.php b/App/Models/Access.php
index 9e5a2c6..09a9942 100644
--- a/App/Models/Access.php
+++ b/App/Models/Access.php
@@ -54,93 +54,4 @@ class Access extends \Core\Model
             echo $e->getMessage();
         }
     }
-
-    public function entry($args)
-    {
-        if (count($args)) {
-            $keys = '`'.implode('`, `', array_keys($args)).'`';
-
-            $x = 1;
-            $values = '';
-            foreach ($args as $field) {
-                $values .= '?';
-                if ($x < count($args)) {
-                    $values .= ', ';
-                }
-                $x++;
-            }
-
-            try {
-                $db = static::connectDB();
-
-                $sql = "INSERT INTO user ({$keys}) VALUES ({$values})";
-
-                $query = $db->prepare($sql);
-
-                $x = 1;
-                foreach ($args as $value) {
-                    $query->bindValue($x, $value);
-                    $x++;
-                }
-
-                if ($query->execute()) {
-                    return true;
-                }
-                return false;
-            } catch (PDOException $e) {
-                echo $e->getMessage();
-            }
-        }
-    }
-
-    public function update($args, $id)
-    {
-        if (count($args)) {
-            $keys = array_keys($args);
-
-            $fields = [];
-            foreach ($keys as $key) {
-                $fields[] = $key.' = ?';
-            }
-
-            try {
-                $db = static::connectDB();
-
-                $sql = "UPDATE user SET ".implode(', ', $fields)." WHERE id = ?";
-
-                $query = $db->prepare($sql);
-                $x = 1;
-                foreach ($args as $value) {
-                    $query->bindValue($x, $value);
-                    $x++;
-                }
-                $query->bindValue($x, $id);
-
-                if ($query->execute()) {
-                    return true;
-                }
-                return false;
-            } catch (PDOException $e) {
-                echo $e->getMessage();
-            }
-        }
-    }
-
-    public function delete($id)
-    {
-        try {
-            $db = static::connectDB();
-
-            $sql = "DELETE FROM user WHERE id = ?";
-
-            $query = $db->prepare($sql);
-
-            if ($query->execute([$id])) {
-                return true;
-            }
-            return false;
-        } catch (PDOException $e) {
-            echo $e->getMessage();
-        }
-    }
 }
diff --git a/App/Models/Post.php b/App/Models/Post.php
index 3594b38..e5e0da5 100644
--- a/App/Models/Post.php
+++ b/App/Models/Post.php
@@ -5,6 +5,7 @@ class Post extends \Core\Model
 {
     public function __construct()
     {
+        // Create table for posts
         $this->createTable(
             'pengumuman',
             [
@@ -19,6 +20,16 @@ class Post extends \Core\Model
                 'PRIMARY KEY (id)'
             ]
         );
+
+        // Create table for categories
+        $this->createTable(
+            'kategori',
+            [
+                'id int(3) NOT NULL AUTO_INCREMENT',
+                'category varchar(20) NOT NULL',
+                'PRIMARY KEY (id)'
+            ]
+        );
     }
 
     public function showAll()
@@ -60,95 +71,4 @@ class Post extends \Core\Model
             echo $e->getMessage();
         }
     }
-
-    public function entry($args)
-    {
-        if (count($args)) {
-            $keys = '`'.implode('`, `', array_keys($args)).'`';
-
-            $x = 1;
-            $values = '';
-            foreach ($args as $field) {
-                $values .= '?';
-                if ($x < count($args)) {
-                    $values .= ', ';
-                }
-                $x++;
-            }
-
-            try {
-                $db = static::connectDB();
-
-                $sql = "INSERT INTO pengumuman ({$keys}) VALUES ({$values})";
-
-                $query = $db->prepare($sql);
-
-                $x = 1;
-
-                foreach ($args as $val) {
-                    $query->bindValue($x, urldecode($val));
-                    $x++;
-                }
-
-                if ($query->execute()) {
-                    return true;
-                }
-                return false;
-            } catch (PDOException $e) {
-                echo $e->getMessage();
-            }
-        }
-    }
-
-    public function update($args, $id)
-    {
-        if (count($args)) {
-            $keys = array_keys($args);
-
-            $fields = [];
-            foreach ($keys as $key) {
-                $fields[] = $key.' = ?';
-            }
-
-            try {
-                $db = static::connectDB();
-
-                $sql = "UPDATE pengumuman SET ".implode(', ', $fields)." WHERE id = ?";
-
-                $query = $db->prepare($sql);
-                $x = 1;
-                foreach ($args as $value) {
-                    $query->bindValue($x, $value);
-                    $x++;
-                }
-                $query->bindValue($x, $id);
-
-                if ($query->execute()) {
-                    return true;
-                }
-                return false;
-            } catch (PDOException $e) {
-                echo $e->getMessage();
-            }
-        }
-    }
-
-    public function delete($id)
-    {
-        try {
-            $db = static::connectDB();
-
-            $sql = "DELETE FROM pengumuman WHERE id = ?";
-
-            $query = $db->prepare($sql);
-
-            if ($query->execute([$id])) {
-                return true;
-            }
-            return false;
-        } catch (PDOException $e) {
-            echo $e->getMessage();
-        }
-
-    }
 }
diff --git a/Core/Model.php b/Core/Model.php
index 9d330b7..f041d48 100644
--- a/Core/Model.php
+++ b/Core/Model.php
@@ -7,6 +7,10 @@ abstract class Model
 {
     protected static $conn = null;
 
+    abstract public function showAll();
+
+    abstract public function showSingle($id);
+
     protected static function connectDB()
     {
         try {
@@ -37,6 +41,11 @@ abstract class Model
 
     public function dropTable($table)
     {
+        if (is_array($table)) {
+            if (count($table)) {
+                $table = implode(', ', $table);
+            }
+        }
         $sql = "DROP TABLE IF EXISTS {$table}";
 
         $db = static::connectDB();
@@ -48,13 +57,128 @@ abstract class Model
         return false;
     }
 
-    abstract public function showAll();
+    public function entry($table, $args, $values = '')
+    {
+        if (count($args)) {
+            $keys = '`'.implode('`, `', array_keys($args)).'`';
 
-    abstract public function showSingle($id);
+            // This is if want to insert multiple rows
+            foreach ($args as $key => $val) {
+                if (preg_match('/,/', $val)) {
+                    $val = explode(',', $val);
+                    $args[$key] = $val;
+                }
+            }
 
-    abstract public function entry($args);
+            $x = 1;
+            foreach ($args as $field) {
+                // Setting the query for multiple rows
+                if (is_array($field)) {
+                    foreach ($field as $fields) {
+                        $values .= '(?)';
+                        if ($x < count($field)) {
+                            $values .= ', ';
+                        }
+                        $x++;
+                    }
+                } else {
+                    if ($x === 1) {
+                        $values .= '(';
+                    }
+                    $values .= '?';
+                    if ($x < count($args)) {
+                        $values .= ', ';
+                    } else {
+                        $values .= ')';
+                    }
+                    $x++;
+                }
+            }
 
-    abstract public function update($args, $id);
+            try {
+                $sql = "INSERT INTO {$table} ({$keys}) VALUES {$values}";
 
-    abstract public function delete($id);
+                $db = static::connectDB();
+
+                $query = $db->prepare($sql);
+
+                $x = 1;
+                foreach ($args as $value) {
+                    if (is_array($value)) {
+                        foreach ($value as $vals) {
+                            $query->bindValue($x, $vals);
+                            $x++;
+                        }
+                    } else {
+                        $query->bindValue($x, $value);
+                        $x++;
+                    }
+                }
+
+                if ($query->execute()) {
+                    return true;
+                }
+                return false;
+            } catch (PDOException $e) {
+                echo $e->getMessage();
+            }
+        }
+    }
+
+    public function update($table, $args, $id)
+    {
+        if (count($args)) {
+            $keys = array_keys($args);
+
+            $fields = [];
+            foreach ($keys as $key) {
+                $fields[] = $key.' = ?';
+            }
+
+            if (count($fields) > 1) {
+                $fields = implode(', ', $fields);
+            } else {
+                $fields = implode('', $fields);
+            }
+
+            try {
+                $db = static::connectDB();
+
+                $sql = "UPDATE {$table} SET {$fields} WHERE id = ?";
+
+                $query = $db->prepare($sql);
+                $x = 1;
+                foreach ($args as $value) {
+                    $query->bindValue($x, $value);
+                    $x++;
+                }
+                $query->bindValue($x, $id);
+
+                if ($query->execute()) {
+                    return true;
+                }
+                return false;
+            } catch (PDOException $e) {
+                echo $e->getMessage();
+            }
+        }
+    }
+
+    public function delete($table, $id)
+    {
+        try {
+            $db = static::connectDB();
+
+            $sql = "DELETE FROM {$table} WHERE id = ?";
+
+            $query = $db->prepare($sql);
+
+            if ($query->execute([$id])) {
+                return true;
+            }
+            return false;
+        } catch (PDOException $e) {
+            echo $e->getMessage();
+        }
+    }
 }
diff --git a/_tests/unit/AccessTest.php b/_tests/unit/AccessTest.php
index 0e0c49d..0d8f622 100644
--- a/_tests/unit/AccessTest.php
+++ b/_tests/unit/AccessTest.php
@@ -13,23 +13,23 @@ class AccessTest extends \PHPUnit\Framework\TestCase
 
         $this->assertTrue($access->showAll());
 
-        $args = [
+        $user_entry = [
             'username' => 'gregorio',
             'password' => 'iniada13charc',
         ];
 
-        $this->assertTrue($access->entry($args));
+        $this->assertTrue($access->entry('user', $user_entry));
 
-        $args = [
+        $user_update = [
             'username' => 'masihgregorio',
             'password' => 'inijuga3belas'
         ];
 
-        $this->assertTrue($access->update($args, 1));
+        $this->assertTrue($access->update('user', $user_update, 1));
 
         $this->assertTrue($access->showSingle(1));
 
-        $this->assertTrue($access->delete(1));
+        $this->assertTrue($access->delete('user', 1));
 
         $this->assertTrue($access->dropTable('user'));
     }
diff --git a/_tests/unit/PostTest.php b/_tests/unit/PostTest.php
index 8a3bd07..cf02599 100644
--- a/_tests/unit/PostTest.php
+++ b/_tests/unit/PostTest.php
@@ -13,26 +13,38 @@ class PostTest extends \PHPUnit\Framework\TestCase
 
         $this->assertTrue($post->showAll());
 
-        $args = [
+        $category_entry = [
+            'category' => 'Akademik,Jadwal,Dosen'
+        ];
+
+        $this->assertTrue($post->entry('kategori', $category_entry));
+
+        $category_update = [
+            'category' => 'Akakademik'
+        ];
+
+        $this->assertTrue($post->update('kategori', $category_update, 1));
+
+        $post_entry = [
             'category' => 3,
             'expired_at' => '2017-09-02',
             'creator' => 2,
             'content' => 'barbarbarbarbarbarbar!'
         ];
 
-        $this->assertTrue($post->entry($args));
+        $this->assertTrue($post->entry('pengumuman', $post_entry));
 
-        $args = [
-            'category' => 5,
+        $post_update = [
+            'category' => 2,
             'content' => 'foofoofoofoo!'
         ];
 
-        $this->assertTrue($post->update($args, 1));
-
+        $this->assertTrue($post->update('pengumuman', $post_update, 1));
+        
         $this->assertTrue($post->showSingle(1));
 
-        $this->assertTrue($post->delete(1));
+        $this->assertTrue($post->delete('pengumuman', 1));
 
-        $this->assertTrue($post->dropTable('pengumuman'));
+        $this->assertTrue($post->dropTable(['pengumuman', 'kategori']));
     }
 }