diff --git a/Sources/Protocols.swift b/Sources/Protocols.swift
index a4b95871..8758a5c7 100644
--- a/Sources/Protocols.swift
+++ b/Sources/Protocols.swift
@@ -8,14 +8,18 @@
 
 import Foundation
 
+/// Abstract archive class which supports unarchiving.
 public protocol Archive {
 
+    /// Abstract unarchive function.
     static func unarchive(archiveData: Data) throws -> Data
 
 }
 
+/// Abstract decompression algorithm class which supports decompression.
 public protocol DecompressionAlgorithm {
 
+    /// Abstract decompress function.
     static func decompress(compressedData: Data) throws -> Data
 
 }