feat: Cleanup mvn deps + general cleanup

Resolves #12 (closed)

config/mariadb/ddl.sql

+CREATE DATABASE eclipse;
+USE eclipse;
+
 CREATE TABLE `downloads` (
   `file_id` int(10) unsigned NOT NULL DEFAULT 0,
   `download_date` datetime DEFAULT NULL,
@@ -16,8 +19,10 @@ CREATE TABLE `download_file_index` (
   `file_name` varchar(255) NOT NULL DEFAULT '',
   `download_count` int(10) unsigned NOT NULL DEFAULT 0,
   `timestamp_disk` bigint(20) NOT NULL DEFAULT 0,
+  `size_disk_bytes` bigint(20) NOT NULL DEFAULT 0,
   `md5sum` char(32) DEFAULT NULL,
   `sha1sum` char(40) DEFAULT NULL,
+  `sha512sum` char(128) DEFAULT NULL,
   PRIMARY KEY (`file_id`),
   KEY `IDX_timestamp_disk` (`timestamp_disk`),
   KEY `idx_file_name` (`file_name`(30))