Generic database (#600)

* Update test

* Rename db to _db

* Create GenericDatabase class

* Catch prepare error

* Allow database to be purged even if it was not open

* Remove unused functions

* Change static functions to non-static

* Delete and count using the media object store

* Update tests

1 files changed, 5 insertions, 1 deletions

diff --git a/ext/bg/js/backend.js b/ext/bg/js/backend.js
index a8ee9f83..b89cb641 100644
--- a/ext/bg/js/backend.js
+++ b/ext/bg/js/backend.js
@@ -172,7 +172,11 @@ class Backend {
             yomichan.on('log', this._onLog.bind(this));
 
             await this.environment.prepare();
-            await this.database.prepare();
+            try {
+                await this.database.prepare();
+            } catch (e) {
+                yomichan.logError(e);
+            }
             await this.translator.prepare();
 
             await profileConditionsDescriptorPromise;