diff --git a/src/db.rs b/src/db.rs
index 48210fd..3601c4d 100644
--- a/src/db.rs
+++ b/src/db.rs
@@ -1,13 +1,29 @@
 use std::collections::HashSet;
+use std::hash::{Hash};
 
 use std::fs;
 use std::io::{self, Write, BufRead};
 
 
+// TODO: use this structure in HashSet of items
+#[derive(Debug, PartialEq, Eq, Hash)]
+pub struct Item {
+    pub id: String,
+    pub content: String
+}
+
+impl Item {
+    pub fn from(s: String) -> Item {
+        Item { id: s, content: String::from("") }
+    }
+}
+
+
 pub struct DB {
     pub items: HashSet::<String>
 }
 
+
 impl DB {
     pub fn new(path: &str) -> io::Result<DB> {
         let file = fs::File::open(path)?;