diff --git a/src/contexts/mod.rs b/src/contexts/mod.rs
new file mode 100644
index 0000000..eec3c89
--- /dev/null
+++ b/src/contexts/mod.rs
@@ -0,0 +1 @@
+pub mod shared;
diff --git a/src/contexts/shared/domain/mod.rs b/src/contexts/shared/domain/mod.rs
new file mode 100644
index 0000000..d802500
--- /dev/null
+++ b/src/contexts/shared/domain/mod.rs
@@ -0,0 +1,13 @@
+use std::path::PathBuf;
+
+pub struct SQLWriter {
+    database: PathBuf,
+}
+
+pub trait Writable {
+    fn write() -> Result<String, diesel::result::Error>;
+}
+
+pub trait Readable {
+    fn read() -> Result<Box<Self>, diesel::result::Error>;
+}
diff --git a/src/contexts/shared/mod.rs b/src/contexts/shared/mod.rs
new file mode 100644
index 0000000..d7abca1
--- /dev/null
+++ b/src/contexts/shared/mod.rs
@@ -0,0 +1 @@
+pub mod domain;