diff --git a/docker-compose.yml b/docker-compose.yml
index bb6a8ae..360ad0d 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,7 +1,7 @@
 services:
   server:
     container_name: actual_sparebank1_cronjob
-    restart: no
+    restart: unless-stopped
     build:
       context: .
     environment:
@@ -16,7 +16,7 @@ services:
       - BANK_OAUTH_CLIENT_SECRET
       - BANK_ACCOUNT_IDS
       - LOG_LEVEL
-      - DB_DIRECTORY # Required for Docker Compose
+      - DB_DIRECTORY
       - DB_FILENAME
       - TRANSACTION_RELATIVE_FROM_DATE
       - TRANSACTION_RELATIVE_TO_DATE
@@ -24,6 +24,7 @@ services:
       - cache:/${ACTUAL_DATA_DIR:-.cache}
       - data:/${DB_DIRECTORY:-data}
 
+# TODO change volume name from hostexecutor-*
 volumes:
   cache:
   data:
diff --git a/packages/common/types.ts b/packages/common/types.ts
new file mode 100644
index 0000000..a79af58
--- /dev/null
+++ b/packages/common/types.ts
@@ -0,0 +1,66 @@
+import type { Dayjs } from "dayjs"
+import type { UUID } from "node:crypto"
+import type { TransactionEntity } from "@actual-app/api/@types/loot-core/types/models"
+
+/**
+ * Defines how to interact with the bank
+ */
+export interface Bank {
+  /**
+   * Fetch all transactions in the specified days, from the given accounts
+   * @param interval Which days to fetch transactions for
+   * @param accountKeys The id of the accounts to fetch transactions from
+   * @returns An array of all transactions
+   */
+  fetchTransactions: (
+    interval: Interval,
+    ...accountKeys: ReadonlyArray<string>
+  ) => Promise<ReadonlyArray<ActualTransaction>>
+
+  /**
+   * Shutdown resources
+   */
+  shutdown: () => Promise<void> | void
+}
+
+export interface Interval {
+  fromDate: Dayjs
+  toDate: Dayjs
+}
+
+/**
+ * Describes how to interact with ActualBudget
+ */
+export interface Actual {
+  /**
+   * Import transactions following the rules defined in the ActualBudget instance
+   * If the transactions exists, it will be updated, or no change should be done.
+   * @param accountId The ActualBudget id to upload to
+   * @param transactions The transactions to import
+   * @returns An object describing what changed
+   */
+  importTransactions: (
+    accountId: UUID,
+    transactions: Iterable<ActualTransaction>,
+  ) => Promise<ImportTransactionsResponse>
+
+  /**
+   * Disconnect from ActualBudget and release resources
+   */
+  shutdown: () => Promise<void>
+}
+
+export interface ActualTransaction extends TransactionEntity {
+  account: UUID
+  payee_name?: string
+}
+
+export interface ImportTransactionsResponse {
+  errors?: Message[]
+  added: number
+  updated: number
+}
+
+export interface Message {
+  message: string
+}
diff --git a/src/bank/db/queries.ts b/packages/sparebank1/db/queries.ts
similarity index 85%
rename from src/bank/db/queries.ts
rename to packages/sparebank1/db/queries.ts
index 72faa99..dfd03ed 100644
--- a/src/bank/db/queries.ts
+++ b/packages/sparebank1/db/queries.ts
@@ -1,22 +1,16 @@
 import Database from "better-sqlite3"
-
-import dayjs, { type Dayjs } from "dayjs"
+import dayjs from "dayjs"
 import type { OAuthTokenResponse } from "@sb1/types.ts"
-
-export type TokenResponse = {
-  key: TokenKey
-  token: string
-  expires_at: Dayjs
-}
-
-type TokenResponseRaw = {
-  [K in keyof TokenResponse]: K extends "expires_at" ? string : TokenResponse[K]
-}
-
-export type TokenKey = "access-token" | "refresh-token"
+import type {
+  TokenKey,
+  TokenResponse,
+  TokenResponseRaw,
+} from "@sb1impl/db/types.ts"
+import logger from "@common/logger.ts"
 
 export function createDb(filepath: string) {
   const db = new Database(filepath)
+  logger.info(`Started Sqlite database at '${filepath}'`)
   db.pragma("journal_mode = WAL")
   db.exec(
     "CREATE TABLE IF NOT EXISTS tokens ('key' VARCHAR PRIMARY KEY, token VARCHAR NOT NULL, expires_at DATETIME NOT NULL)",
diff --git a/packages/sparebank1/db/types.ts b/packages/sparebank1/db/types.ts
new file mode 100644
index 0000000..3883c7c
--- /dev/null
+++ b/packages/sparebank1/db/types.ts
@@ -0,0 +1,13 @@
+import type { Dayjs } from "dayjs"
+
+export type TokenResponse = {
+  key: TokenKey
+  token: string
+  expires_at: Dayjs
+}
+
+export type TokenResponseRaw = {
+  [K in keyof TokenResponse]: K extends "expires_at" ? string : TokenResponse[K]
+}
+
+export type TokenKey = "access-token" | "refresh-token"
diff --git a/src/mappings.ts b/packages/sparebank1/mappings.ts
similarity index 96%
rename from src/mappings.ts
rename to packages/sparebank1/mappings.ts
index cab08c6..d27f65b 100644
--- a/src/mappings.ts
+++ b/packages/sparebank1/mappings.ts
@@ -1,10 +1,10 @@
 import type { UUID } from "node:crypto"
 import dayjs from "dayjs"
-import { type ActualTransaction } from "@/actual.ts"
 import { ACTUAL_ACCOUNT_IDS, BANK_ACCOUNT_IDS } from "@/config.ts"
 import logger from "@common/logger.ts"
 import { toISODateString } from "@common/date.ts"
 import type { SB1Transaction } from "@sb1/types.ts"
+import type { ActualTransaction } from "@common/types.ts"
 
 export function bankTransactionIntoActualTransaction(
   transaction: SB1Transaction,
diff --git a/src/bank/sparebank1.ts b/packages/sparebank1/sparebank1.ts
similarity index 80%
rename from src/bank/sparebank1.ts
rename to packages/sparebank1/sparebank1.ts
index f7c01f6..e7b5253 100644
--- a/src/bank/sparebank1.ts
+++ b/packages/sparebank1/sparebank1.ts
@@ -2,39 +2,33 @@ import {
   BANK_INITIAL_REFRESH_TOKEN,
   BANK_OAUTH_CLIENT_ID,
   BANK_OAUTH_CLIENT_SECRET,
+  DB_DIRECTORY,
+  DB_FILENAME,
 } from "@/config.ts"
 import logger from "@common/logger.ts"
-import dayjs, { type Dayjs } from "dayjs"
+import dayjs from "dayjs"
 import type { Database } from "better-sqlite3"
 import {
   clearTokens,
+  createDb,
   fetchToken,
   insertTokens,
-  type TokenResponse,
-} from "@/bank/db/queries.ts"
+} from "@sb1impl/db/queries.ts"
 import * as Oauth from "@sb1/oauth.ts"
 import * as Transactions from "@sb1/transactions.ts"
-import type { ActualTransaction } from "@/actual.ts"
-import { bankTransactionIntoActualTransaction } from "@/mappings.ts"
+import { bankTransactionIntoActualTransaction } from "./mappings.ts"
 import type { OAuthTokenResponse } from "@sb1/types.ts"
-
-export interface Bank {
-  fetchTransactions: (
-    interval: Interval,
-    ...accountKeys: ReadonlyArray<string>
-  ) => Promise<ReadonlyArray<ActualTransaction>>
-}
-
-export interface Interval {
-  fromDate: Dayjs
-  toDate: Dayjs
-}
+import type { ActualTransaction, Bank, Interval } from "@common/types.ts"
+import type { TokenResponse } from "@sb1impl/db/types.ts"
+import { createDirIfMissing } from "@/fs.ts"
 
 export class Sparebank1Impl implements Bank {
   private readonly db: Database
 
-  constructor(db: Database) {
-    this.db = db
+  constructor() {
+    createDirIfMissing(DB_DIRECTORY)
+    const databaseFilePath = `${DB_DIRECTORY}/${DB_FILENAME}.sqlite`
+    this.db = createDb(databaseFilePath)
   }
 
   async fetchTransactions(
@@ -50,6 +44,10 @@ export class Sparebank1Impl implements Bank {
     return sparebankTransactions.map(bankTransactionIntoActualTransaction)
   }
 
+  shutdown(): void {
+    this.db.close()
+  }
+
   private async getAccessToken(): Promise<string> {
     const accessToken = fetchToken(this.db, "access-token")
 
diff --git a/packages/sparebank1Api/oauth.ts b/packages/sparebank1Api/oauth.ts
index 5067324..8b85ec9 100644
--- a/packages/sparebank1Api/oauth.ts
+++ b/packages/sparebank1Api/oauth.ts
@@ -1,4 +1,4 @@
-import { OAuthTokenResponse, Result } from "./types"
+import type { OAuthTokenResponse, Result } from "./types"
 import * as querystring from "node:querystring"
 import { baseUrl, failure, success } from "./common"
 import logger from "@common/logger"
diff --git a/packages/sparebank1Api/transactions.ts b/packages/sparebank1Api/transactions.ts
index 2825853..efb25b8 100644
--- a/packages/sparebank1Api/transactions.ts
+++ b/packages/sparebank1Api/transactions.ts
@@ -1,8 +1,9 @@
-import type { Interval, TransactionResponse } from "./types"
+import type { TransactionResponse } from "./types"
 import * as querystring from "node:querystring"
 import { toISODateString } from "@common/date"
 import logger from "@common/logger"
 import { baseUrl } from "./common"
+import type { Interval } from "@common/types.ts"
 
 export async function list(
   accessToken: string,
@@ -18,7 +19,7 @@ export async function list(
   })
 
   const url = `${baseUrl}/personal/banking/transactions?${queryString}`
-  logger.debug(`Sending GET request to '${url}'`)
+  logger.info(`GET '${url}'`)
   const response = await fetch(url, {
     headers: {
       Authorization: `Bearer ${accessToken}`,
diff --git a/packages/sparebank1Api/types.ts b/packages/sparebank1Api/types.ts
index 4322c7d..af8ee8d 100644
--- a/packages/sparebank1Api/types.ts
+++ b/packages/sparebank1Api/types.ts
@@ -1,14 +1,7 @@
-import type { Dayjs } from "dayjs"
-
 export type Success<T> = { status: "success"; data: T }
 export type Failure<T> = { status: "failure"; data: T }
 export type Result<OK, Err> = Success<OK> | Failure<Err>
 
-export interface Interval {
-  fromDate: Dayjs
-  toDate: Dayjs
-}
-
 export interface OAuthTokenResponse {
   access_token: string
   expires_in: number
@@ -20,6 +13,10 @@ export interface OAuthTokenResponse {
 
 export type BookingStatus = "PENDING" | "BOOKED"
 
+/**
+ * 18-character unique ID used to identify a transaction
+ * The value is "000000000000000000" until the transaction is booked, and might be set a few days later
+ */
 export type NonUniqueId = "000000000000000000" | `${number}`
 
 export interface SB1Transaction {
diff --git a/src/actual.ts b/src/actual.ts
index b623db8..12affcd 100644
--- a/src/actual.ts
+++ b/src/actual.ts
@@ -5,38 +5,20 @@ import {
   ACTUAL_SERVER_URL,
   ACTUAL_SYNC_ID,
 } from "@/config.ts"
-import type { TransactionEntity } from "@actual-app/api/@types/loot-core/types/models"
-import { type UUID } from "node:crypto"
 import logger from "@common/logger.ts"
-
-export interface Actual {
-  importTransactions: (
-    accountId: UUID,
-    transactions: Iterable<ActualTransaction>,
-  ) => Promise<ImportTransactionsResponse>
-
-  shutdown: () => Promise<void>
-}
-
-export interface ActualTransaction extends TransactionEntity {
-  account: UUID
-  payee_name?: string
-}
-
-export interface Message {
-  message: string
-}
-
-export interface ImportTransactionsResponse {
-  errors?: Message[]
-  added: number
-  updated: number
-}
+import type { UUID } from "node:crypto"
+import type {
+  Actual,
+  ActualTransaction,
+  ImportTransactionsResponse,
+} from "@common/types.ts"
+import { createDirIfMissing } from "@/fs.ts"
 
 export class ActualImpl implements Actual {
   private constructor() {}
 
   static async init(): Promise<Actual> {
+    createDirIfMissing(ACTUAL_DATA_DIR)
     await actual.init({
       // Budget data will be cached locally here, in subdirectories for each file.
       dataDir: ACTUAL_DATA_DIR,
@@ -73,6 +55,7 @@ export class ActualImpl implements Actual {
   }
 
   async shutdown(): Promise<void> {
+    logger.info(`Shutting down ActualBudget API for ${ACTUAL_SERVER_URL}`)
     return actual.shutdown()
   }
 
diff --git a/src/fs.ts b/src/fs.ts
index 790c71f..bdae7c2 100644
--- a/src/fs.ts
+++ b/src/fs.ts
@@ -1,10 +1,6 @@
 import * as fs from "node:fs"
 import logger from "@common/logger"
 
-export function createDirsIfMissing(...directories: string[]): void {
-  directories.forEach(createDirIfMissing)
-}
-
 export function createDirIfMissing(directory: string): void {
   if (!fs.existsSync(directory)) {
     logger.info(`Missing '${directory}', creating...`)
diff --git a/src/main.ts b/src/main.ts
index 16dfbb6..4b83c7b 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,32 +1,38 @@
-import { type Actual, ActualImpl } from "@/actual.ts"
+import { ActualImpl } from "@/actual.ts"
 import { cronJobDaily } from "@/cron.ts"
-import { type Bank, type Interval, Sparebank1Impl } from "@/bank/sparebank1.ts"
 import {
-  ACTUAL_DATA_DIR,
   BANK_ACCOUNT_IDS,
-  DB_DIRECTORY,
-  DB_FILENAME,
   TRANSACTION_RELATIVE_FROM_DATE,
   TRANSACTION_RELATIVE_TO_DATE,
 } from "@/config.ts"
 import logger from "@common/logger.ts"
 import type { UUID } from "node:crypto"
-import { createDb } from "@/bank/db/queries.ts"
 import { CronJob } from "cron"
-import { createDirsIfMissing } from "@/fs.ts"
 import dayjs from "dayjs"
+import type { Actual, Bank, Interval } from "@common/types.ts"
+import { Sparebank1Impl } from "@sb1impl/sparebank1.ts"
 
 // TODO move tsx to devDependency. Requires ts support for Node with support for @ alias
 // TODO verbatimSyntax in tsconfig, conflicts with jest
-// TODO multi module project. Main | DAL | Sparebank1 impl
 // TODO store last fetched date in db, and refetch from that date, if app has been offline for some time
 // TODO do not fetch if saturday or sunday
 
+async function main(): Promise<void> {
+  logger.info("Starting application")
+  const bank = new Sparebank1Impl()
+
+  if (process.env.ONCE) {
+    return await runOnce(bank)
+  }
+  await ActualImpl.testConnection()
+  await runCronJob(bank)
+}
+
+// TODO log the days the transactions are fetched
 export async function moveTransactions(
   actual: Actual,
   bank: Bank,
 ): Promise<void> {
-  // Fetch transactions from the bank
   const actualTransactions = await bank.fetchTransactions(
     relativeInterval(),
     ...BANK_ACCOUNT_IDS,
@@ -61,53 +67,57 @@ function relativeInterval(): Interval {
   }
 }
 
-async function main(): Promise<void> {
-  logger.info("Starting application")
+async function runOnce(bank: Bank) {
+  const actual = await ActualImpl.init()
 
-  createDirsIfMissing(ACTUAL_DATA_DIR, DB_DIRECTORY)
+  registerInterrupt(bank)
 
-  const databaseFilePath = `${DB_DIRECTORY}/${DB_FILENAME}.sqlite`
-  const db = createDb(databaseFilePath)
-  logger.info(`Started Sqlite database at '${databaseFilePath}'`)
-  const bank = new Sparebank1Impl(db)
-
-  process.on("SIGINT", async () => {
-    logger.info("Caught interrupt signal")
-    await shutdown()
-  })
-
-  let cronJob: CronJob | undefined
-  if (process.env.ONCE) {
-    const actual = await ActualImpl.init()
-    try {
-      return await moveTransactions(actual, bank)
-    } finally {
-      await actual.shutdown()
-      await shutdown()
-    }
-  } else {
-    await ActualImpl.testConnection()
+  try {
+    return await moveTransactions(actual, bank)
+  } finally {
+    await actual.shutdown()
+    await shutdown(bank)
   }
+}
+
+async function runCronJob(bank: Bank): Promise<void> {
+  let actual: Actual | undefined
+  let cronJob: CronJob | undefined
 
   logger.info("Waiting for CronJob to start")
-  let actual: Actual | undefined
   try {
+    // TODO move try-catch inside closure?
     cronJob = cronJobDaily(async () => {
       actual = await ActualImpl.init()
       await moveTransactions(actual, bank)
     })
+    registerInterrupt(bank, cronJob)
   } catch (exception) {
     logger.error(exception, "Caught exception at CronJob, shutting down!")
-    await shutdown()
+    await shutdown(bank, cronJob)
   } finally {
+    // TODO shuts down immediatly, move into closure
     await actual?.shutdown()
   }
-
-  async function shutdown(): Promise<void> {
-    logger.info("Shutting down, Bye!")
-    db.close()
-    cronJob?.stop()
-  }
+}
+
+function registerInterrupt(
+  bank: Bank,
+  cronJob: CronJob | undefined = undefined,
+): void {
+  process.on("SIGINT", async () => {
+    logger.info("Caught interrupt signal")
+    await shutdown(bank, cronJob)
+  })
+}
+
+async function shutdown(
+  bank: Bank,
+  cronJob: CronJob | undefined = undefined,
+): Promise<void> {
+  logger.info("Shutting down, Bye!")
+  await bank.shutdown()
+  cronJob?.stop()
 }
 
 void main()
diff --git a/tsconfig.json b/tsconfig.json
index ad3d7f7..ea00ad3 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -13,7 +13,8 @@
     "paths": {
       "@/*": ["./src/*"],
       "@common/*": ["./packages/common/*"],
-      "@sb1/*": ["./packages/sparebank1Api/*"]
+      "@sb1/*": ["./packages/sparebank1Api/*"],
+      "@sb1impl/*": ["./packages/sparebank1/*"]
     }
   },
   "exclude": ["node_modules", "./*.ts", "__test__"]