Add storage/backend setup

src/module/mod.rs

@@ -6,7 +6,8 @@ use std::fmt::Display;
 use std::path::Path;
 use std::result::Result;
 
-use storage::backend::*;
+use storage::backend::{StorageBackend, StorageBackendError};
+mod command;
 
 #[derive(Debug)]
 pub struct ModuleError {

src/storage/backend.rs

@@ -0,0 +1,53 @@
+use std::error::Error;
+use std::fmt::Display;
+
+use super::file::FileID;
+use super::file::File;
+use module::Module;
+
+type BackendOperationResult = Result<(), StorageBackendError>;
+
+pub struct StorageBackend<'a> {
+    basepath: String,
+    module: &'a Module,
+}
+
+impl<'a> StorageBackend<'a> {
+
+    fn new() -> StorageBackend<'a> {
+    }
+
+    fn getFileList() -> Vec<(String, FileID)> {
+    }
+
+    fn createEmpty() -> FileID {
+    }
+
+    fn createFile() -> File {
+    }
+
+    fn writeFile(f: File) -> BackendOperationResult {
+    }
+
+    fn createFileWithContent(content: String) -> BackendOperationResult {
+    }
+
+    fn readFile(id: FileID) -> String {
+    }
+
+    // TODO: Meta files are not covered yet
+
+}
+
+#[derive(Debug)]
+pub struct StorageBackendError;
+
+impl StorageBackendError {
+}
+
+impl Error for StorageBackendError {
+}
+
+impl Display for StorageBackendError {
+}
+

src/storage/mod.rs

@@ -6,6 +6,7 @@ pub use runtime::Runtime;
 
 pub mod file;
 pub mod parser;
+pub mod backend;
 
 pub mod json;