diff --git a/src/main/java/com/github/demidko/aot/ImmutableList.java b/src/main/java/com/github/demidko/aot/ImmutableList.java
deleted file mode 100644
index 331f33e..0000000
--- a/src/main/java/com/github/demidko/aot/ImmutableList.java
+++ /dev/null
@@ -1,161 +0,0 @@
-package com.github.demidko.aot;
-
-import java.util.Collection;
-import java.util.Iterator;
-import java.util.List;
-import java.util.ListIterator;
-
-/**
- * Класс позволяет создать список меньшего размера, на основе массива большего размера, без копирования.
- */
-class ImmutableList<T> implements List<T> {
-
-  class Iter implements Iterator<T> {
-
-    private int i = -1;
-
-    @Override
-    public boolean hasNext() {
-      return (i + 1) < len;
-    }
-
-    @Override
-    public T next() {
-      return arr[++i];
-    }
-  }
-
-  private final T[] arr;
-  private final int len;
-
-  ImmutableList(T[] arr, int len) {
-    this.arr = arr;
-    this.len = len;
-  }
-
-  @Override
-  public int size() {
-    return len;
-  }
-
-  @Override
-  public boolean isEmpty() {
-    return len == 0;
-  }
-
-  @Override
-  public boolean contains(Object o) {
-    return indexOf(o) != -1;
-  }
-
-  @Override
-  public Iterator<T> iterator() {
-    return new Iter();
-  }
-
-  @Override
-  public Object[] toArray() {
-    return arr;
-  }
-
-  @Override
-  public <K> K[] toArray(K[] ts) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public boolean add(T T) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public boolean remove(Object o) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public boolean containsAll(Collection<?> collection) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public boolean addAll(Collection<? extends T> collection) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public boolean addAll(int i, Collection<? extends T> collection) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public boolean removeAll(Collection<?> collection) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public boolean retainAll(Collection<?> collection) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public void clear() {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public T get(int i) {
-    return arr[i];
-  }
-
-  @Override
-  public T set(int i, T T) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public void add(int i, T T) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public T remove(int i) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public int indexOf(Object o) {
-    for (int i = 0; i < len; ++i) {
-      if (arr[i] == o) {
-        return i;
-      }
-    }
-    return -1;
-  }
-
-  @Override
-  public int lastIndexOf(Object o) {
-    int res = -1;
-    for (int i = 0; i < len; ++i) {
-      if (arr[i] == o) {
-        res = i;
-      }
-    }
-    return res;
-  }
-
-  @Override
-  public ListIterator<T> listIterator() {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public ListIterator<T> listIterator(int i) {
-    throw new UnsupportedOperationException();
-  }
-
-  @Override
-  public List<T> subList(int i, int i1) {
-    throw new UnsupportedOperationException();
-  }
-}
\ No newline at end of file
diff --git a/src/main/java/com/github/demidko/aot/WordformMeaning.java b/src/main/java/com/github/demidko/aot/WordformMeaning.java
index 3e31d88..1d9c56e 100644
--- a/src/main/java/com/github/demidko/aot/WordformMeaning.java
+++ b/src/main/java/com/github/demidko/aot/WordformMeaning.java
@@ -60,7 +60,7 @@ public class WordformMeaning {
    * @param lemmaId             Идентификатор леммы
    * @param transformationIndex Индекс трансформации леммы
    */
-  WordformMeaning(int lemmaId, int transformationIndex) {
+  private WordformMeaning(int lemmaId, int transformationIndex) {
     this.lemmaId = lemmaId;
     this.transformationIndex = transformationIndex;
   }