little refactoring

app/src/main/java/com/ethosa/ktc/activities/MainActivity.kt

@@ -19,15 +19,8 @@ class MainActivity : AppCompatActivity() {
 
         binding = ActivityMainBinding.inflate(layoutInflater)
         setContentView(binding.root)
-        setupUi()
-    }
 
-    /**
-     * Setups UI and receives last news from ktc site.
-     */
-    private fun setupUi() {
         val navView: BottomNavigationView = binding.navView
-
         val navController = findNavController(R.id.nav_host_fragment_activity_main)
         navView.setupWithNavController(navController)
     }

app/src/main/java/com/ethosa/ktc/college/CollegeApi.kt

@@ -4,6 +4,9 @@ import com.ethosa.ktc.college.interfaces.CollegeCallback
 import okhttp3.OkHttpClient
 import okhttp3.Request
 
+/**
+ * Provides working with KTC api.
+ */
 class CollegeApi {
     companion object {
         private val client: OkHttpClient = OkHttpClient()

app/src/main/java/com/ethosa/ktc/glide/transformation/BitmapTransformation.kt

@@ -11,6 +11,9 @@ import com.bumptech.glide.request.target.Target
 import com.bumptech.glide.util.Util
 import java.security.MessageDigest
 
+/**
+ * Provides glide Transformation with Bitmap
+ */
 abstract class BitmapTransformation :
     Transformation<Bitmap?> {
     override fun transform(
@@ -42,6 +45,9 @@ abstract class BitmapTransformation :
         return result
     }
 
+    /**
+     * Changes canvas bitmap density
+     */
     fun setCanvasBitmapDensity(toTransform: Bitmap, canvasBitmap: Bitmap) {
         canvasBitmap.density = toTransform.density
     }

app/src/main/java/com/ethosa/ktc/glide/transformation/CenterInsideBlur.kt

@@ -8,6 +8,9 @@ import com.bumptech.glide.load.resource.bitmap.TransformationUtils
 import jp.wasabeef.glide.transformations.internal.FastBlur
 import java.security.MessageDigest
 
+/**
+ * Provides transformation with centered image and blurred it.
+ */
 class CenterInsideBlur @JvmOverloads constructor(
     private val radius: Int = MAX_RADIUS,
     private val sampling: Int = DEFAULT_DOWN_SAMPLING