1 files changed, 19 insertions, 0 deletions
diff --git a/alot/db/errors.py b/alot/db/errors.py
new file mode 100644
index 00000000..17ef219c
--- /dev/null
+++ b/alot/db/errors.py
@@ -0,0 +1,19 @@
+class DatabaseError(Exception):
+    pass
+
+
+class DatabaseROError(DatabaseError):
+    """cannot write to read-only database"""
+    pass
+
+
+class DatabaseLockedError(DatabaseError):
+    """cannot write to locked index"""
+    pass
+
+
+class NonexistantObjectError(DatabaseError):
+    """requested thread or message does not exist in the index"""
+    pass
+
+