diff --git a/scrub_layer_class.py b/scrub_layer_class.py
index 832bf35..6521dc4 100644
--- a/scrub_layer_class.py
+++ b/scrub_layer_class.py
@@ -26,26 +26,40 @@ class ScrubLayer:
       QgsProject.instance().addMapLayer(the_layer)
     return the_layer
 
+  def fix_geometries(self, fixed_layer):
+    QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())
+    fix_geometries_params = {
+      'INPUT': self.layer,
+      'METHOD': 0,
+      'OUTPUT': fixed_layer
+    }
+    processing.run("native:fixgeometries", fix_geometries_params)
+
   def create_spatial_index(self):
     QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())
     create_spatial_index_params = {
-      'INPUT': self.layer_path,
+      'INPUT': self.layer,
       'OUTPUT': 'Output'
     }
     processing.run("native:createspatialindex", create_spatial_index_params)
+    print(f'Creating spatial index for {self.layer_name} is completed.')
+
+  def clip_layer(self, overlay_layer, clipped_layer):
+    QgsApplication.processingRegistry().addProvider(QgsNativeAlgorithms())
+    clip_layer_params = {
+      'INPUT': self.layer_path,
+      'OVERLAY': overlay_layer,
+      'FILTER_EXPRESSION': '',
+      'FILTER_EXTENT': None,
+      'OUTPUT': clipped_layer
+    }
+    processing.run("native:clip", clip_layer_params)
+    print(f'Clipping of {self.layer_name} is completed.')
 
   @staticmethod
   def cleanup():
     QgsApplication.exitQgis()
 
 
-if __name__ == '__main__':
-  app_path = 'C:/Program Files/QGIS 3.34.1/apps/qgis'
-  new_path = 'C:/Users/a_adli/PycharmProjects/hydroquebec_archetype_gispy/' \
-             'data/test_data/test_input/nrcan_north/nrcan_north.shp'
-  data_layer_name = 'nrcan_north'
-  handle_layer = ScrubLayer(app_path, new_path, data_layer_name)
-  # print(handle_layer.layer.featureCount())
-  handle_layer.create_spatial_index()
 
 
diff --git a/scrub_mtl_class.py b/scrub_mtl_class.py
new file mode 100644
index 0000000..9e0be9c
--- /dev/null
+++ b/scrub_mtl_class.py
@@ -0,0 +1,32 @@
+from scrub_layer_class import *
+
+
+class ScrubMTL:
+  def __init__(self):
+    pass
+
+  def define_input_paths(self):
+    """Can be a part of the constructor"""
+    pass
+
+  def generate_output_paths(self):
+    pass
+
+  def initialize_layer(self):
+    pass
+
+  def process_nrcan(self):
+    pass
+
+  def process_geo_index(self):
+    pass
+
+  def process_property_assesment(self):
+    pass
+
+  def remove_redundant_fields(self):
+    pass
+
+  def remove_records_by_area(self, area_limitation):
+    """Area limitation can be assigned in the constructor"""
+    pass