diff --git a/analysis_options.yaml b/analysis_options.yaml
index 5f59a0d..5c17980 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml
@@ -1,7 +1,6 @@
 include: package:lints/recommended.yaml
 linter:
   rules:
-    - file_names
     - prefer_const_constructors
     - sort_constructors_first
 analyzer:
diff --git a/lib/src/bindings/stash.dart b/lib/src/bindings/stash.dart
index bb91e1b..fb72979 100644
--- a/lib/src/bindings/stash.dart
+++ b/lib/src/bindings/stash.dart
@@ -1,6 +1,7 @@
 import 'dart:ffi';
 import 'package:ffi/ffi.dart';
 import '../error.dart';
+import '../oid.dart';
 import '../stash.dart';
 import 'checkout.dart' as checkout_bindings;
 import 'libgit2_bindings.dart';
@@ -142,7 +143,7 @@ int _stashCb(
   _stashList.add(Stash(
     index: index,
     message: message.cast<Utf8>().toDartString(),
-    oid: oid,
+    oid: Oid(oid),
   ));
   return 0;
 }
diff --git a/lib/src/branch.dart b/lib/src/branch.dart
index 1b9199f..56fe586 100644
--- a/lib/src/branch.dart
+++ b/lib/src/branch.dart
@@ -7,7 +7,6 @@ import 'reference.dart';
 import 'repository.dart';
 import 'oid.dart';
 import 'git_types.dart';
-import 'util.dart';
 
 class Branches {
   /// Initializes a new instance of the [Branches] class
@@ -81,12 +80,10 @@ class Branch {
   /// branch object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Branch(this._branchPointer) {
-    libgit2.git_libgit2_init();
-  }
+  const Branch(this._branchPointer);
 
   /// Pointer to memory address for allocated branch object.
-  late final Pointer<git_reference> _branchPointer;
+  final Pointer<git_reference> _branchPointer;
 
   /// Returns the OID pointed to by a branch.
   ///
diff --git a/lib/src/config.dart b/lib/src/config.dart
index 21cd0b5..a4a9015 100644
--- a/lib/src/config.dart
+++ b/lib/src/config.dart
@@ -144,11 +144,11 @@ class Config with IterableMixin<ConfigEntry> {
 
   @override
   Iterator<ConfigEntry> get iterator =>
-      ConfigIterator(bindings.iterator(_configPointer));
+      _ConfigIterator(bindings.iterator(_configPointer));
 }
 
 class ConfigEntry {
-  ConfigEntry(this._configEntryPointer);
+  const ConfigEntry(this._configEntryPointer);
 
   /// Pointer to memory address for allocated config entry object.
   final Pointer<git_config_entry> _configEntryPointer;
@@ -183,8 +183,8 @@ class ConfigEntry {
   }
 }
 
-class ConfigIterator implements Iterator<ConfigEntry> {
-  ConfigIterator(this._iteratorPointer);
+class _ConfigIterator implements Iterator<ConfigEntry> {
+  _ConfigIterator(this._iteratorPointer);
 
   /// Pointer to memory address for allocated config iterator.
   final Pointer<git_config_iterator> _iteratorPointer;
diff --git a/lib/src/diff.dart b/lib/src/diff.dart
index a9ca618..2e66d10 100644
--- a/lib/src/diff.dart
+++ b/lib/src/diff.dart
@@ -122,7 +122,7 @@ class Diff {
 class DiffDelta {
   /// Initializes a new instance of [DiffDelta] class from provided
   /// pointer to diff delta object in memory.
-  DiffDelta(this._diffDeltaPointer);
+  const DiffDelta(this._diffDeltaPointer);
 
   /// Pointer to memory address for allocated diff delta object.
   final Pointer<git_diff_delta> _diffDeltaPointer;
@@ -182,7 +182,7 @@ class DiffDelta {
 /// are tracking type changes or ignored/untracked directories).
 class DiffFile {
   /// Initializes a new instance of [DiffFile] class from provided diff file object.
-  DiffFile(this._diffFile);
+  const DiffFile(this._diffFile);
 
   final git_diff_file _diffFile;
 
@@ -223,7 +223,7 @@ class DiffFile {
 class DiffStats {
   /// Initializes a new instance of [DiffStats] class from provided
   /// pointer to diff stats object in memory.
-  DiffStats(this._diffStatsPointer);
+  const DiffStats(this._diffStatsPointer);
 
   /// Pointer to memory address for allocated diff delta object.
   final Pointer<git_diff_stats> _diffStatsPointer;
@@ -255,7 +255,7 @@ class DiffStats {
 class DiffHunk {
   /// Initializes a new instance of [DiffHunk] class from provided
   /// pointers to patch object and diff hunk object in memory and number of lines in hunk.
-  DiffHunk(
+  const DiffHunk(
     this._patchPointer,
     this._diffHunkPointer,
     this.linesCount,
@@ -269,10 +269,10 @@ class DiffHunk {
   final Pointer<git_patch> _patchPointer;
 
   /// Returns count of total lines in this hunk.
-  late final int linesCount;
+  final int linesCount;
 
   /// Returns index of this hunk in the patch.
-  late final int index;
+  final int index;
 
   /// Returns starting line number in 'old file'.
   int get oldStart => _diffHunkPointer.ref.old_start;
@@ -310,7 +310,7 @@ class DiffHunk {
 class DiffLine {
   /// Initializes a new instance of [DiffLine] class from provided
   /// pointer to diff line object in memory.
-  DiffLine(this._diffLinePointer);
+  const DiffLine(this._diffLinePointer);
 
   /// Pointer to memory address for allocated diff line object.
   final Pointer<git_diff_line> _diffLinePointer;
diff --git a/lib/src/index.dart b/lib/src/index.dart
index f45f4e0..cceccfb 100644
--- a/lib/src/index.dart
+++ b/lib/src/index.dart
@@ -9,18 +9,15 @@ import 'bindings/diff.dart' as diff_bindings;
 import 'oid.dart';
 import 'git_types.dart';
 import 'repository.dart';
-import 'util.dart';
 
 class Index with IterableMixin<IndexEntry> {
   /// Initializes a new instance of [Index] class from provided
   /// pointer to index object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Index(this._indexPointer) {
-    libgit2.git_libgit2_init();
-  }
+  const Index(this._indexPointer);
 
-  late final Pointer<git_index> _indexPointer;
+  final Pointer<git_index> _indexPointer;
 
   /// Pointer to memory address for allocated index object.
   Pointer<git_index> get pointer => _indexPointer;
@@ -237,10 +234,10 @@ class Index with IterableMixin<IndexEntry> {
 
 class IndexEntry {
   /// Initializes a new instance of [IndexEntry] class.
-  IndexEntry(this._indexEntryPointer);
+  const IndexEntry(this._indexEntryPointer);
 
   /// Pointer to memory address for allocated index entry object.
-  late final Pointer<git_index_entry> _indexEntryPointer;
+  final Pointer<git_index_entry> _indexEntryPointer;
 
   /// Unique identity of the index entry.
   Oid get id => Oid.fromRaw(_indexEntryPointer.ref.id);
diff --git a/lib/src/odb.dart b/lib/src/odb.dart
index 2c0358d..4be4637 100644
--- a/lib/src/odb.dart
+++ b/lib/src/odb.dart
@@ -1,16 +1,13 @@
 import 'dart:ffi';
 import 'bindings/libgit2_bindings.dart';
 import 'bindings/odb.dart' as bindings;
-import 'util.dart';
 
 class Odb {
   /// Initializes a new instance of [Odb] class from provided
   /// pointer to Odb object in memory.
-  Odb(this._odbPointer) {
-    libgit2.git_libgit2_init();
-  }
+  const Odb(this._odbPointer);
 
-  late final Pointer<git_odb> _odbPointer;
+  final Pointer<git_odb> _odbPointer;
 
   /// Pointer to memory address for allocated oid object.
   Pointer<git_odb> get pointer => _odbPointer;
diff --git a/lib/src/oid.dart b/lib/src/oid.dart
index 817e832..1222e91 100644
--- a/lib/src/oid.dart
+++ b/lib/src/oid.dart
@@ -7,9 +7,7 @@ import 'util.dart';
 class Oid {
   /// Initializes a new instance of [Oid] class from provided
   /// pointer to Oid object in memory.
-  Oid(this._oidPointer) {
-    libgit2.git_libgit2_init();
-  }
+  Oid(this._oidPointer);
 
   /// Initializes a new instance of [Oid] class by determining if an object can be found
   /// in the ODB of [repository] with provided hexadecimal [sha] string that is 40 characters
@@ -34,7 +32,6 @@ class Oid {
 
   /// Initializes a new instance of [Oid] class from provided raw git_oid.
   Oid.fromRaw(git_oid raw) {
-    libgit2.git_libgit2_init();
     _oidPointer = bindings.fromRaw(raw.id);
   }
 
diff --git a/lib/src/patch.dart b/lib/src/patch.dart
index fd156cc..f3615ab 100644
--- a/lib/src/patch.dart
+++ b/lib/src/patch.dart
@@ -5,16 +5,13 @@ import 'bindings/patch.dart' as bindings;
 import 'blob.dart';
 import 'diff.dart';
 import 'git_types.dart';
-import 'util.dart';
 
 class Patch {
   /// Initializes a new instance of [Patch] class from provided
   /// pointer to patch object in memory and pointers to old and new blobs/buffers.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Patch(this._patchPointer, this._aPointer, this._bPointer) {
-    libgit2.git_libgit2_init();
-  }
+  Patch(this._patchPointer, this._aPointer, this._bPointer);
 
   /// Directly generates a patch from the difference between two blobs, buffers or
   /// blob and a buffer.
diff --git a/lib/src/reflog.dart b/lib/src/reflog.dart
index b67ad14..cbe3664 100644
--- a/lib/src/reflog.dart
+++ b/lib/src/reflog.dart
@@ -4,15 +4,12 @@ import 'bindings/libgit2_bindings.dart';
 import 'bindings/reflog.dart' as bindings;
 import 'reference.dart';
 import 'signature.dart';
-import 'util.dart';
 
 class RefLog with IterableMixin<RefLogEntry> {
   /// Initializes a new instance of [RefLog] class from provided [Reference].
   ///
   /// Throws a [LibGit2Error] if error occured.
   RefLog(Reference ref) {
-    libgit2.git_libgit2_init();
-
     final repo = ref.owner;
     final name = ref.name;
     _reflogPointer = bindings.read(repo.pointer, name);
@@ -38,10 +35,10 @@ class RefLog with IterableMixin<RefLogEntry> {
 
 class RefLogEntry {
   /// Initializes a new instance of [RefLogEntry] class.
-  RefLogEntry(this._entryPointer);
+  const RefLogEntry(this._entryPointer);
 
   /// Pointer to memory address for allocated reflog entry object.
-  late final Pointer<git_reflog_entry> _entryPointer;
+  final Pointer<git_reflog_entry> _entryPointer;
 
   /// Returns the log message.
   String get message => bindings.entryMessage(_entryPointer);
diff --git a/lib/src/refspec.dart b/lib/src/refspec.dart
index 54bf501..2f4a925 100644
--- a/lib/src/refspec.dart
+++ b/lib/src/refspec.dart
@@ -8,7 +8,7 @@ import 'git_types.dart';
 class Refspec {
   /// Initializes a new instance of the [Refspec] class
   /// from provided pointer to refspec object in memory.
-  Refspec(this._refspecPointer);
+  const Refspec(this._refspecPointer);
 
   /// Pointer to memory address for allocated refspec object.
   final Pointer<git_refspec> _refspecPointer;
diff --git a/lib/src/remote.dart b/lib/src/remote.dart
index b0b03c6..d040d28 100644
--- a/lib/src/remote.dart
+++ b/lib/src/remote.dart
@@ -117,10 +117,10 @@ class Remotes {
 class Remote {
   /// Initializes a new instance of [Remote] class from provided pointer
   /// to remote object in memory.
-  Remote(this._remotePointer);
+  const Remote(this._remotePointer);
 
   /// Pointer to memory address for allocated remote object.
-  late final Pointer<git_remote> _remotePointer;
+  final Pointer<git_remote> _remotePointer;
 
   /// Returns the remote's name.
   String get name => bindings.name(_remotePointer);
@@ -198,7 +198,7 @@ class Remote {
 class TransferProgress {
   /// Initializes a new instance of [TransferProgress] class from provided pointer
   /// to transfer progress object in memory.
-  TransferProgress(this._transferProgressPointer);
+  const TransferProgress(this._transferProgressPointer);
 
   /// Pointer to memory address for allocated transfer progress object.
   final Pointer<git_indexer_progress> _transferProgressPointer;
diff --git a/lib/src/revparse.dart b/lib/src/revparse.dart
index fc29f22..268dea8 100644
--- a/lib/src/revparse.dart
+++ b/lib/src/revparse.dart
@@ -60,10 +60,10 @@ class RevParse {
 class RevSpec {
   /// Initializes a new instance of [RevSpec] class from provided
   /// pointer to revspec object in memory.
-  RevSpec(this._revSpecPointer);
+  const RevSpec(this._revSpecPointer);
 
   /// Pointer to memory address for allocated revspec object.
-  late final Pointer<git_revspec> _revSpecPointer;
+  final Pointer<git_revspec> _revSpecPointer;
 
   /// The left element of the revspec; must be freed by the user.
   Commit get from => Commit(_revSpecPointer.ref.from.cast());
diff --git a/lib/src/signature.dart b/lib/src/signature.dart
index 925e93a..9b58d75 100644
--- a/lib/src/signature.dart
+++ b/lib/src/signature.dart
@@ -10,9 +10,7 @@ class Signature {
   /// signature object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Signature(this._signaturePointer) {
-    libgit2.git_libgit2_init();
-  }
+  Signature(this._signaturePointer);
 
   /// Initializes a new instance of [Signature] class from provided [name], [email],
   /// and optional [time] in seconds from epoch and [offset] in minutes.
diff --git a/lib/src/stash.dart b/lib/src/stash.dart
index 3e677ef..d661041 100644
--- a/lib/src/stash.dart
+++ b/lib/src/stash.dart
@@ -1,16 +1,12 @@
-import 'dart:ffi';
-import 'bindings/libgit2_bindings.dart';
 import 'oid.dart';
 
 class Stash {
   /// Initializes a new instance of [Stash] class.
-  Stash({
+  const Stash({
     required this.index,
     required this.message,
-    required Pointer<git_oid> oid,
-  }) {
-    this.oid = Oid(oid);
-  }
+    required this.oid,
+  });
 
   /// The position within the stash list.
   final int index;
@@ -19,7 +15,7 @@ class Stash {
   final String message;
 
   /// The commit oid of the stashed state.
-  late final Oid oid;
+  final Oid oid;
 
   @override
   String toString() {
diff --git a/lib/src/tag.dart b/lib/src/tag.dart
index 4f77016..0cf231e 100644
--- a/lib/src/tag.dart
+++ b/lib/src/tag.dart
@@ -9,16 +9,13 @@ import 'repository.dart';
 import 'signature.dart';
 import 'git_types.dart';
 import 'tree.dart';
-import 'util.dart';
 
 class Tag {
   /// Initializes a new instance of [Tag] class from provided pointer to
   /// tag object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Tag(this._tagPointer) {
-    libgit2.git_libgit2_init();
-  }
+  Tag(this._tagPointer);
 
   /// Initializes a new instance of [Tag] class from provided
   /// [Repository] object and [sha] hex string.
diff --git a/lib/src/tree.dart b/lib/src/tree.dart
index 94829a2..3e2914c 100644
--- a/lib/src/tree.dart
+++ b/lib/src/tree.dart
@@ -7,16 +7,13 @@ import 'index.dart';
 import 'repository.dart';
 import 'oid.dart';
 import 'git_types.dart';
-import 'util.dart';
 
 class Tree {
   /// Initializes a new instance of [Tree] class from provided pointer to
   /// tree object in memory.
   ///
   /// Should be freed with `free()` to release allocated memory.
-  Tree(this._treePointer) {
-    libgit2.git_libgit2_init();
-  }
+  Tree(this._treePointer);
 
   /// Initializes a new instance of [Tree] class from provided
   /// [Repository] object and [sha] hex string.
@@ -142,7 +139,7 @@ class Tree {
 
 class TreeEntry {
   /// Initializes a new instance of [TreeEntry] class.
-  TreeEntry(this._treeEntryPointer);
+  const TreeEntry(this._treeEntryPointer);
 
   /// Pointer to memory address for allocated tree entry object.
   final Pointer<git_tree_entry> _treeEntryPointer;