diff --git a/src/deps.ts b/src/deps.ts
new file mode 100644
index 0000000..891f7b6
--- /dev/null
+++ b/src/deps.ts
@@ -0,0 +1,5 @@
+export { Buffer, StringReader } from "https://deno.land/std@0.191.0/io/mod.ts";
+export { readAll, readerFromIterable, readableStreamFromReader, readerFromStreamReader, iterateReader, TextLineStream } from "https://deno.land/std@0.191.0/streams/mod.ts";
+export { Application, Context, Router } from 'https://deno.land/x/oak/mod.ts';
+
+
diff --git a/src/restapi.ts b/src/restapi.ts
index 820af11..131ffe2 100644
--- a/src/restapi.ts
+++ b/src/restapi.ts
@@ -1,6 +1,6 @@
-import { Context, Router } from "https://deno.land/x/oak/mod.ts";
-import { FileService } from "./fileservice.ts";
-import { readerFromStreamReader, readableStreamFromReader, TextLineStream } from "https://deno.land/std@0.191.0/streams/mod.ts";
+import { Context, Router } from "./deps.ts";
+import { FileService } from "./services/mod.ts";
+import { readerFromStreamReader } from "./deps.ts";
 import { asyncIterableToArray } from "./utils.ts";
 
 
diff --git a/src/server.ts b/src/server.ts
index c87112b..975409f 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -1,6 +1,6 @@
-import { Application, Router } from 'https://deno.land/x/oak/mod.ts';
+import { Application, Router } from './deps.ts';
 import { buildAPI } from './restapi.ts';
-import { DenoKVFileService } from "./fileservice.ts";
+import { DenoKVFileService } from "./services/mod.ts";
 
 async function main(){
     const app = new Application();
diff --git a/src/fileservice.ts b/src/services/denokv.ts
similarity index 88%
rename from src/fileservice.ts
rename to src/services/denokv.ts
index 2f6dff6..c7282c2 100644
--- a/src/fileservice.ts
+++ b/src/services/denokv.ts
@@ -1,42 +1,10 @@
-import { readAll } from "https://deno.land/std@0.191.0/streams/read_all.ts";
-import { readerFromIterable, iterateReader } from "https://deno.land/std@0.191.0/streams/mod.ts";
-import { Buffer } from "https://deno.land/std@0.191.0/io/buffer.ts";
-
-import { StringReader } from "https://deno.land/std@0.191.0/io/string_reader.ts";
-
+import { readAll, readerFromIterable, iterateReader } from "../deps.ts";
+import { Buffer, StringReader } from "../deps.ts";
+import {FileService, FileMetaData, BlobService} from './interfaces.ts';
 
 import { readerFromStreamReader, readableStreamFromReader } from "https://deno.land/std@0.191.0/streams/mod.ts";
 
 
-
-
-export interface FileService {
-
-    list(): AsyncIterable<FileMetaData>;
-
-    createFromFullContent(
-        path: string,
-        content: string | Uint8Array,
-    ): Promise<FileMetaData>;
-    
-    createFromReader(path: string, content: Deno.Reader): Promise<FileMetaData>;
-    
-    getRawContentByPath(path: string): Promise<Uint8Array | null>;
-
-    getContentAsReader(path: string): Promise<Deno.Reader | null>;
-
-    getMetaDataByID(id: string): Promise<FileMetaData | null>;
-    
-    renameById(id: string, newPath: string): Promise<FileMetaData | null>;
-
-    renameByPath(
-        originalPath: string,
-        newPath: string,
-    ): Promise<FileMetaData | null>;
-
-    deleteByPath(path: string): Promise<boolean>;
-}
-
 interface SerializedFile {
     id: string;
     path: string;
@@ -44,17 +12,12 @@ interface SerializedFile {
     compression: string;
 }
 
-export interface FileMetaData {
-    path: string;
-    id: string;
-    contentSize: number;
-}
 
 interface SerializedFilePathIndex {
     fileId: string;
 }
 
-export class DenoKVBlobService {
+export class DenoKVBlobService implements BlobService {
     private readonly kv: Deno.Kv;
     private readonly blobSize: number;
 
@@ -172,7 +135,7 @@ export class DenoKVBlobService {
 
 export class DenoKVFileService implements FileService {
     private readonly kv: Deno.Kv;
-    private readonly blobService: DenoKVBlobService;
+    private readonly blobService: BlobService;
 
     constructor(kv: Deno.Kv) {
         this.kv = kv;
diff --git a/src/services/interfaces.ts b/src/services/interfaces.ts
new file mode 100644
index 0000000..d0b0b4a
--- /dev/null
+++ b/src/services/interfaces.ts
@@ -0,0 +1,43 @@
+export interface FileMetaData {
+    path: string;
+    id: string;
+    contentSize: number;
+}
+
+
+export interface FileService {
+
+    list(): AsyncIterable<FileMetaData>;
+
+    createFromFullContent(
+        path: string,
+        content: string | Uint8Array,
+    ): Promise<FileMetaData>;
+    
+    createFromReader(path: string, content: Deno.Reader): Promise<FileMetaData>;
+    
+    getRawContentByPath(path: string): Promise<Uint8Array | null>;
+
+    getContentAsReader(path: string): Promise<Deno.Reader | null>;
+
+    getMetaDataByID(id: string): Promise<FileMetaData | null>;
+    
+    renameById(id: string, newPath: string): Promise<FileMetaData | null>;
+
+    renameByPath(
+        originalPath: string,
+        newPath: string,
+    ): Promise<FileMetaData | null>;
+
+    deleteByPath(path: string): Promise<boolean>;
+}
+
+
+export interface BlobService {
+    persistBlob(index: string, content: Uint8Array): Promise<number>;
+    persistReader(index: string, content: Deno.Reader): Promise<number>;
+    readAllBlob(index: string): Promise<Uint8Array>;
+    getBlob(index: string): Deno.Reader;
+    getNumberOfBlobs(index: string): Promise<number>;
+    streamBlob(index: string): Deno.Reader;
+}
\ No newline at end of file
diff --git a/src/services/mod.ts b/src/services/mod.ts
new file mode 100644
index 0000000..f7ea77c
--- /dev/null
+++ b/src/services/mod.ts
@@ -0,0 +1,2 @@
+export * from './interfaces.ts';
+export {DenoKVBlobService, DenoKVFileService} from './denokv.ts';
\ No newline at end of file
diff --git a/tests/fileservice_test.ts b/tests/fileservice_test.ts
index 0ac03f7..18c670e 100644
--- a/tests/fileservice_test.ts
+++ b/tests/fileservice_test.ts
@@ -5,7 +5,7 @@ import {
   DenoKVFileService,
   FileMetaData,
   FileService,
-} from "../src/fileservice.ts";
+} from "../src/services/mod.ts";
 import { asyncIterableToArray } from "../src/utils.ts";
 import { generateLargeText } from "./utils.ts";
 import { StringReader } from "https://deno.land/std@0.191.0/io/mod.ts";