diff --git a/src/jvmMain/java/ru/langrafhomyak/db/jdbc_resources_manager/PreparedStatementsCompilationCache.java b/src/jvmMain/java/ru/langrafhomyak/db/jdbc_resources_manager/PreparedStatementsCompilationCache.java
new file mode 100644
index 0000000..7f6c836
--- /dev/null
+++ b/src/jvmMain/java/ru/langrafhomyak/db/jdbc_resources_manager/PreparedStatementsCompilationCache.java
@@ -0,0 +1,12 @@
+package ru.langrafhomyak.db.jdbc_resources_manager;
+
+import org.jetbrains.annotations.NotNull;
+
+import java.sql.Connection;
+import java.sql.PreparedStatement;
+import java.sql.SQLException;
+
+public interface PreparedStatementsCompilationCache {
+	@NotNull
+	PreparedStatement preparedStatementForConnection(@NotNull Connection connection) throws SQLException;
+}
diff --git a/src/jvmMain/java/ru/langrafhomyak/db/jdbc_resources_manager/PreparedStatementsCompilationPhantomCache.java b/src/jvmMain/java/ru/langrafhomyak/db/jdbc_resources_manager/PreparedStatementsCompilationPhantomCache.java
index 28a7301..0f9a617 100644
--- a/src/jvmMain/java/ru/langrafhomyak/db/jdbc_resources_manager/PreparedStatementsCompilationPhantomCache.java
+++ b/src/jvmMain/java/ru/langrafhomyak/db/jdbc_resources_manager/PreparedStatementsCompilationPhantomCache.java
@@ -11,7 +11,7 @@ import java.sql.SQLException;
 
 import static java.lang.System.identityHashCode;
 
-public class PreparedStatementsCompilationPhantomCache /*implements ReadOnlyProperty<Object,?>*/ {
+public class PreparedStatementsCompilationPhantomCache implements PreparedStatementsCompilationCache {
 	@NotNull
 	private final String _statementSource;
 	@NotNull
@@ -22,6 +22,7 @@ public class PreparedStatementsCompilationPhantomCache /*implements ReadOnlyProp
 		this._map = new _SynchronizedEmbedKeyHashMap<>();
 	}
 
+	@Override
 	@NotNull
 	public PreparedStatement preparedStatementForConnection(@NotNull Connection connection) throws SQLException {
 		final int key = identityHashCode(connection);