diff --git a/src/directory/directory.rs b/src/directory/directory.rs
index a3e9e0dfe..6607d4872 100644
--- a/src/directory/directory.rs
+++ b/src/directory/directory.rs
@@ -2,7 +2,7 @@ use std::marker::Send;
 use std::marker::Sync;
 use std::fmt;
 use std::path::Path;
-use directory::{FileError, OpenWriteError};
+use directory::error::{FileError, OpenWriteError};
 use directory::{ReadOnlySource, WritePtr};
 use std::result;
 use std::io;
diff --git a/src/directory/error.rs b/src/directory/error.rs
new file mode 100644
index 000000000..0acd38cc1
--- /dev/null
+++ b/src/directory/error.rs
@@ -0,0 +1,32 @@
+use std::path::PathBuf;
+use std::io;
+
+#[derive(Debug)]
+pub enum OpenWriteError {
+    FileAlreadyExists(PathBuf),
+    IOError(io::Error),
+}
+
+impl From<io::Error> for OpenWriteError {
+    fn from(err: io::Error) -> OpenWriteError {
+        OpenWriteError::IOError(err)
+    }
+}
+
+#[derive(Debug)]
+pub enum FileError {
+    FileDoesNotExist(PathBuf),
+    IOError(io::Error),
+}
+
+impl From<io::Error> for FileError {
+    fn from(err: io::Error) -> FileError {
+        FileError::IOError(err)
+    }
+}
+
+#[derive(Debug)]
+pub enum OpenDirectoryError {
+    DoesNotExist,
+    NotADirectory,
+}
\ No newline at end of file
diff --git a/src/directory/mmap_directory.rs b/src/directory/mmap_directory.rs
index 551b82eb5..05927a813 100644
--- a/src/directory/mmap_directory.rs
+++ b/src/directory/mmap_directory.rs
@@ -15,7 +15,7 @@ use directory::ReadOnlySource;
 use directory::WritePtr;
 use std::io::BufWriter;
 use std::fs::OpenOptions;
-use directory::{OpenWriteError, FileError, OpenDirectoryError};
+use directory::error::{OpenWriteError, FileError, OpenDirectoryError};
 use std::result;
 use common::make_io_err;
 
diff --git a/src/directory/mod.rs b/src/directory/mod.rs
index 5d698e9ce..b0b0ce99b 100644
--- a/src/directory/mod.rs
+++ b/src/directory/mod.rs
@@ -3,48 +3,15 @@ mod ram_directory;
 mod directory;
 mod read_only_source;
 mod shared_vec_slice;
+pub mod error;
 
 use std::io::{Seek, Write};
-use std::io;
-
-use std::path::PathBuf;
 
 pub use self::read_only_source::ReadOnlySource;
 pub use self::directory::Directory;
 pub use self::ram_directory::RAMDirectory;
 pub use self::mmap_directory::MmapDirectory;
 
-#[derive(Debug)]
-pub enum OpenWriteError {
-    FileAlreadyExists(PathBuf),
-    IOError(io::Error),
-}
-
-impl From<io::Error> for OpenWriteError {
-    fn from(err: io::Error) -> OpenWriteError {
-        OpenWriteError::IOError(err)
-    }
-}
-
-#[derive(Debug)]
-pub enum FileError {
-    FileDoesNotExist(PathBuf),
-    IOError(io::Error),
-}
-
-impl From<io::Error> for FileError {
-    fn from(err: io::Error) -> FileError {
-        FileError::IOError(err)
-    }
-}
-
-#[derive(Debug)]
-pub enum OpenDirectoryError {
-    DoesNotExist,
-    NotADirectory,
-}
-
-
 pub trait SeekableWrite: Seek + Write {}
 impl<T: Seek + Write> SeekableWrite for T {}
 
@@ -54,7 +21,6 @@ impl<T: Seek + Write> SeekableWrite for T {}
 /// and Seek.
 pub type WritePtr = Box<SeekableWrite>;
 
-
 #[cfg(test)]
 mod tests {
 
diff --git a/src/directory/ram_directory.rs b/src/directory/ram_directory.rs
index b09de430c..672414389 100644
--- a/src/directory/ram_directory.rs
+++ b/src/directory/ram_directory.rs
@@ -1,14 +1,14 @@
-use directory::{Directory, ReadOnlySource};
-use std::io::{Cursor, Write, Seek, SeekFrom};
-use std::io;
-use std::fmt;
-use std::sync::{Arc, RwLock};
 use std::collections::HashMap;
+use std::fmt;
+use std::io;
+use std::io::{Cursor, Write, Seek, SeekFrom};
 use std::path::{Path, PathBuf};
-use directory::{OpenWriteError, FileError};
-use directory::WritePtr;
 use std::result;
+use std::sync::{Arc, RwLock};
 use common::make_io_err;
+use directory::{Directory, ReadOnlySource};
+use directory::error::{OpenWriteError, FileError};
+use directory::WritePtr;
 use super::shared_vec_slice::SharedVecSlice;
 
 /// Writer associated to the `RAMDirectory`
@@ -108,7 +108,7 @@ impl InnerDirectory {
     fn delete(&self, path: &Path) -> result::Result<(), FileError> {
         self.0
             .write()
-            .map_err(|err| {
+            .map_err(|_| {
                 let io_err = make_io_err(format!("Failed to acquire write lock for the directory, when trying to delete {:?}", path));
                 FileError::IOError(io_err)
             })
diff --git a/src/error.rs b/src/error.rs
index 50d6fb4ae..55c18a563 100644
--- a/src/error.rs
+++ b/src/error.rs
@@ -3,7 +3,7 @@ use std::result;
 use std::path::PathBuf;
 use std::error;
 use std::sync::PoisonError;
-use directory::{FileError, OpenWriteError, OpenDirectoryError};
+use directory::error::{FileError, OpenWriteError, OpenDirectoryError};
 
 #[derive(Debug)]
 pub enum Error {