diff --git a/snark-storage-driver/src/main/kotlin/space/kscience/snark/storage/local/localDriver.kt b/snark-storage-driver/src/main/kotlin/space/kscience/snark/storage/local/localDriver.kt
index e198bae..554faf0 100644
--- a/snark-storage-driver/src/main/kotlin/space/kscience/snark/storage/local/localDriver.kt
+++ b/snark-storage-driver/src/main/kotlin/space/kscience/snark/storage/local/localDriver.kt
@@ -6,14 +6,14 @@ import space.kscience.snark.storage.FileWriter
 import java.io.File
 import java.nio.file.Path
 
-public class LocalFile(val path: String): FileReader, FileWriter{
+public class LocalFile(private val path: String) : FileReader, FileWriter {
     override fun close() {}
     override suspend fun readAll(): ByteArray = File(this.path).readBytes()
 
     override suspend fun write(bytes: ByteArray) = File(this.path).writeBytes(bytes)
 }
 
-public class LocalDirectory(val path: String): Directory {
+public class LocalDirectory(private val path: String) : Directory {
     override fun close() {}
     override suspend fun get(filename: String): FileReader = LocalFile("${this.path}/$filename")
 
@@ -22,10 +22,11 @@ public class LocalDirectory(val path: String): Directory {
             throw UnsupportedOperationException("File already exists")
         }
     }
+
     override suspend fun put(filename: String): FileWriter = LocalFile("${this.path}/$filename")
 
     override suspend fun getSubdir(dirpath: Path): Directory = LocalDirectory("${this.path}/$dirpath")
-    override suspend fun createSubdir(dirname: String, ignoreIfExists: Boolean) : Directory {
+    override suspend fun createSubdir(dirname: String, ignoreIfExists: Boolean): Directory {
         if (!File(dirname).mkdir() && !ignoreIfExists) {
             throw UnsupportedOperationException("File already exists")
         }