Fixed issue #94

.gitignore

@@ -13,4 +13,4 @@ dev/
 todo
 deploy.secret.sh
 release_notes.txt
-out
+out/

src/main/kotlin/de/fabianonline/telegram_backup/Database.kt

@@ -275,11 +275,11 @@ class Database private constructor(var client: TelegramClient) {
 			rs.next()
 			val result = rs.getInt(1)
 			rs.close()
+
 			return result
 		} catch (e: SQLException) {
 			throw RuntimeException("Could not get count of messages.")
 		}
-
 	}
 
 	@Synchronized

src/main/kotlin/de/fabianonline/telegram_backup/DatabaseUpdates.kt

@@ -109,10 +109,10 @@ class DatabaseUpdates(protected var conn: Connection, protected var db: Database
 				logger.debug("No update necessary.")
 			}
 
+			stmt.close()
 		} catch (e: SQLException) {
 			throw RuntimeException(e)
 		}
-
 	}
 
 	private fun getUpdateToVersion(i: Int): DatabaseUpdate {
@@ -143,7 +143,6 @@ internal abstract class DatabaseUpdate(protected var conn: Connection, protected
 		} catch (e: SQLException) {
 			throw RuntimeException(e)
 		}
-
 	}
 
 	@Throws(SQLException::class)
@@ -153,6 +152,8 @@ internal abstract class DatabaseUpdate(protected var conn: Connection, protected
 		_doUpdate()
 		logger.debug("Saving current database version to the db")
 		stmt.executeUpdate("INSERT INTO database_versions (version) VALUES ($version)")
+
+		stmt.close()
 	}
 
 	@Throws(SQLException::class)