code good so far

database.js

@@ -43,7 +43,7 @@ let close = () => {
     });
 }
 
-let main = async () => {
+/* let main = async () => {
     query('insert into log (message) values (\'Outside\')');
     let rows = null;
     try {
@@ -56,14 +56,21 @@ let main = async () => {
     } catch (ex) {
         console.error('Error', ex);
     }
+}
+
+main(); */
+
+let exitHandler = (eventType) => {
+    console.log("DB-Cleaning up (" + eventType + ")");
     close();
 }
 
-main();
+// make sure we close the DB in case the process ends.
-
+[`exit`, `SIGINT`, `SIGUSR1`, `SIGUSR2`, `uncaughtException`, `SIGTERM`].forEach((eventType) => {
+    process.on(eventType, exitHandler.bind(null, eventType));
+  })
 
 
 module.exports = {
-    query,
+    query
-    close
 };

index.js

@@ -1,31 +1,18 @@
-const sqlite3 = require('sqlite3').verbose();
+const db = require('./database');
 
-let db = new sqlite3.Database('playdb.sqlite3', sqlite3.OPEN_READWRITE, (err) => {
+let main = async () => {
-    if (err) {
+    db.query('insert into log (message) values (\'Outside\')');
-        console.error("ERROR: opening DB failed: ", err.message);
+    let rows = null;
+    try {
+        await db.query('insert into log (message) values (\'start\')');
+        rows = await db.query('select * from Option');
+        rows.forEach((row) => {
+            console.log(row.ID + "\t" + row.PutCall);
+        })
+        await db.query('insert into log (message) values (\'end\')');
+    } catch (ex) {
+        console.error('Error', ex);
     }
-    console.log('Connected.');
+}
-});
 
-db.serialize(() => {
+main(); 
-    db.each('select * from option', (err, row) => {
-        if (err) {
-            console.error("ERROR: fetching data: ", err.message);
-        }
-        console.log(row.ID + "\t" + row.PutCall);
-    });
-    db.run('insert into Log (Message) values (\'' + new Date().toUTCString() + '\')', (err) => {
-        if (err) {
-            console.error("ERROR: inserting row: ", err.message);
-        }
-        console.log('Log-Row inserted');
-    });
-
-});
-
-db.close((err) => {
-    if (err) {
-        console.error("ERROR: closing DB: ", err.message);
-    }
-    console.log('DB Connection closed');
-})