diff --git a/src/detection/coverart.rs b/src/detection/coverart.rs
index e5d86de..fc5cc39 100644
--- a/src/detection/coverart.rs
+++ b/src/detection/coverart.rs
@@ -1,8 +1,8 @@
 /// Gets the file type of a CoverArt given it's path
 pub fn file_type_from_filepath(filepath: &str) -> Result<String, std::io::Error> {
     match imghdr::from_file(filepath) {
-        Ok(Some(imghdr::Type::Jpeg)) => Ok(String::from("jpeg")),
-        Ok(Some(imghdr::Type::Png)) => Ok(String::from("png")),
+        Ok(Some(imghdr::Type::Jpeg)) => Ok(String::from(constants::JPEG_TYPE)),
+        Ok(Some(imghdr::Type::Png)) => Ok(String::from(constants::PNG_TYPE)),
         Ok(None) => Err(std::io::Error::other("Image file not supported")),
         Err(err) => Err(err),
         _ => Err(std::io::Error::other("Image file not supported")),
@@ -12,13 +12,19 @@ pub fn file_type_from_filepath(filepath: &str) -> Result<String, std::io::Error>
 /// Gets the file type of a CoverArt given it's data
 pub fn file_type_from_data(data: &Vec<u8>) -> Result<String, std::io::Error> {
     match imghdr::from_bytes(data) {
-        Some(imghdr::Type::Jpeg) => Ok(String::from("jpeg")),
-        Some(imghdr::Type::Png) => Ok(String::from("png")),
+        Some(imghdr::Type::Jpeg) => Ok(String::from(constants::JPEG_TYPE)),
+        Some(imghdr::Type::Png) => Ok(String::from(constants::PNG_TYPE)),
         None => Err(std::io::Error::other("Image file not supported")),
         _ => Err(std::io::Error::other("Image file not supported")),
     }
 }
 
+pub mod constants {
+    pub const PNG_TYPE: &str = "png";
+    pub const JPEG_TYPE: &str = "jpeg";
+    pub const JPG_TYPE: &str = "jpg";
+}
+
 #[cfg(test)]
 mod tests {
     #[test]
diff --git a/src/detection/mod.rs b/src/detection/mod.rs
index 165fc86..b1ecbb7 100644
--- a/src/detection/mod.rs
+++ b/src/detection/mod.rs
@@ -1 +1,9 @@
 pub mod coverart;
+pub mod song;
+
+pub struct FileType {
+    pub mime: String
+}
+
+pub enum FileTypeDef {
+}
diff --git a/src/detection/song.rs b/src/detection/song.rs
index 03563a6..ed0099e 100644
--- a/src/detection/song.rs
+++ b/src/detection/song.rs
@@ -13,3 +13,7 @@ pub fn file_type_from_filepath(filepath: &str) -> Result<String, std::io::Error>
         }
     }
 }
+
+pub mod constants {
+    pub const FLAC_TYPE: &str = "flac";
+}