Few final tweaks. Everything seems to be working alright.

gradle.properties

@@ -9,6 +9,6 @@ loader_version=0.8.2+build.194
 fabric_version=0.5.1+build.294-1.15
 
 # Mod Properties
-mod_version = 1.2.0S-1.15
+mod_version = 1.2.0-1.15
 maven_group = net.szum123321
 archives_base_name = textile_backup

src/main/java/net/szum123321/textile_backup/ConfigHandler.java

@@ -27,60 +27,60 @@ import java.util.Set;
 @ConfigFile(name = TextileBackup.MOD_ID)
 public class ConfigHandler {
     @Comment("\nTime between backups in seconds\n")
-    public final long backupInterval = 3600;
+    public long backupInterval = 3600;
 
     @Comment("\nShould backups be done even if there is no players?\n")
-    public final boolean doBackupsOnEmptyServer = false;
+    public boolean doBackupsOnEmptyServer = false;
 
     @Comment("\nShould backups be made on server shutdown\n")
-    public final boolean shutdownBackup = true;
+    public boolean shutdownBackup = true;
 
     @Comment("\nA path to backup folder\n")
-    public final String path = "backup/";
+    public String path = "backup/";
 
     @Comment("\nThis setting allows you to exclude files form being backuped.\n"+
                 "Be very careful when setting it, as it is easy to make your backuped world unusable!\n")
-    public final Set<String> fileBlacklist = new HashSet<>();
+    public Set<String> fileBlacklist = new HashSet<>();
 
     @Comment("\nShould every world has its won backup folder?\n")
-    public final boolean perWorldBackup = false;
+    public boolean perWorldBackup = false;
 
     @Comment("\nMaximum number of backups to keep. If 0 then no backup will be deleted based on its amount\n")
-    public final int backupsToKeep = 10;
+    public int backupsToKeep = 10;
 
     @Comment("\nMaximum age of backups to keep in seconds.\n if 0 then backups will not be deleted based on its age \n")
-    public final long maxAge = 0;
+    public long maxAge = 0;
 
     @Comment("\nMaximum size of backup folder in kilo bytes. \n")
-    public final int maxSize = 0;
+    public int maxSize = 0;
 
     @Comment("\nCompression level \n0 - 9\n Only available for zip compression.\n")
-    public final int compression = 1;
+    public int compression = 6;
 
     @Comment(value = "\nAvailable formats are:\n" +
                     "ZIP - normal zip archive using standard deflate compression\n" +
                     "GIZP - tar.gz using gzip compression\n" +
                     "BZIP2 - tar.bz2 archive using bzip2 compression\n" +
                     "LZMA - tar.xz using lzma compression\n")
-    public final ArchiveFormat format = ArchiveFormat.ZIP;
+    public ArchiveFormat format = ArchiveFormat.ZIP;
 
     @Comment("\nPrint info to game out\n")
-    public final boolean log = true;
+    public boolean log = true;
 
     @Comment("\nMinimal permission level required to run commands\n")
-    public final int permissionLevel = 4;
+    public int permissionLevel = 4;
 
     @Comment("\nPlayer on singleplayer is always allowed to run command. Warning! On lan party everyone will be allowed to run it.\n")
-    public final boolean alwaysSingleplayerAllowed = true;
+    public boolean alwaysSingleplayerAllowed = true;
 
     @Comment("\nPlayers allowed to run backup commands without sufficient permission level\n")
-    public final Set<String> playerWhitelist = new HashSet<>();
+    public Set<String> playerWhitelist = new HashSet<>();
 
     @Comment("\nPlayers banned from running backup commands besides their sufficient permission level\n")
-    public final Set<String> playerBlacklist = new HashSet<>();
+    public Set<String> playerBlacklist = new HashSet<>();
 
     @Comment("\nFormat of date&time used to name backup files.\n")
-    public final String dateTimeFormat = "dd.MM.yyyy_HH-mm-ss";
+    public String dateTimeFormat = "dd.MM.yyyy_HH-mm-ss";
 
     public enum ArchiveFormat {
         ZIP(".zip"),

src/main/java/net/szum123321/textile_backup/core/compressors/ParallelZipCompressor.java

@@ -72,7 +72,6 @@ public class ParallelZipCompressor {
 
 		public InputStream get() {
 			try {
-				System.out.println("Creating: " + sourceFile);
 				stream = Files.newInputStream(sourceFile);
 			} catch (IOException e) {
 				e.printStackTrace();