/*
 * Copyright 2017, TeamDev Ltd. All rights reserved.
 *
 * Redistribution and use in source and/or binary forms, with or without
 * modification, must retain the above copyright notice and the following
 * disclaimer.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

package io.spine.tools;

import com.squareup.javapoet.AnnotationSpec;
import com.squareup.javapoet.CodeBlock;

import javax.annotation.Generated;

/**
 * @author Dmytro Dashenkov
 */
public final class CodeGeneration {

    private static final AnnotationSpec GENERATED;
    private static final String GENERATED_FIELD_NAME = "value";

    static {
        final CodeBlock generatedByDescription = CodeBlock.of("\"by Spine compiler\"");
        GENERATED = AnnotationSpec.builder(Generated.class)
                                  .addMember(GENERATED_FIELD_NAME, generatedByDescription)
                                  .build();
    }

    /**
     * The {@code private} constructor prevents the utility class instantiation.
     */
    private CodeGeneration() {
    }

    public static AnnotationSpec generatedAnnotation() {
        return GENERATED;
    }
}

@@ -1161,16 +1161,73 @@
 d;%0A%0A/**%0A
+ * A factory for the commonly used Java source specs.%0A *%0A
  * @auth
@@ -1837,24 +1837,249 @@
 () %7B%0A    %7D%0A%0A
+    /**%0A     * Generates %7B@code %5C@Generated(%22by Spine compiler%22)%7D annotation spec.%0A     *%0A     * @return an %7B@link AnnotationSpec%7D describing the %7B@link Generated javax.annotation.Generated%7D%0A     *         annotation%0A     */%0A
     public s

Add some Javadoc for the `CodeGeneration`.