field initialization fix: add body for incomplete constructor

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/initializeFinalFieldInConstructor/afterIncompleteConstructor.java

@@ -0,0 +1,8 @@
+// "Initialize in constructor" "true"
+class A {
+  private final int var;
+
+    private Main() {
+        var = 0;
+    }
+}

java/java-tests/testData/codeInsight/daemonCodeAnalyzer/quickFix/initializeFinalFieldInConstructor/beforeIncompleteConstructor.java

@@ -0,0 +1,6 @@
+// "Initialize in constructor" "true"
+class A {
+  private final int v<caret>ar;
+
+  private Main()
+}