[ONOS-4350] Inter Jar dependency implementation and code restructuring.

Change-Id: Iacac75e4187aed93ce1754c170a9c19707e5b8c3
diff --git a/plugin/src/main/java/org/onosproject/yangutils/translator/tojava/TempJavaServiceFragmentFiles.java b/plugin/src/main/java/org/onosproject/yangutils/translator/tojava/TempJavaServiceFragmentFiles.java
new file mode 100644
index 0000000..0d6215e
--- /dev/null
+++ b/plugin/src/main/java/org/onosproject/yangutils/translator/tojava/TempJavaServiceFragmentFiles.java
@@ -0,0 +1,802 @@
+/*
+ * Copyright 2016-present Open Networking Laboratory
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.onosproject.yangutils.translator.tojava;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.List;
+
+import org.onosproject.yangutils.datamodel.YangNode;
+import org.onosproject.yangutils.datamodel.YangNotification;
+import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaModule;
+import org.onosproject.yangutils.translator.tojava.javamodel.YangJavaSubModule;
+import org.onosproject.yangutils.translator.tojava.utils.YangPluginConfig;
+
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_EVENT_CLASS;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_EVENT_LISTENER_INTERFACE;
+import static org.onosproject.yangutils.translator.tojava.GeneratedJavaFileType.GENERATE_EVENT_SUBJECT_CLASS;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EVENT_ENUM_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EVENT_METHOD_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EVENT_SUBJECT_ATTRIBUTE_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EVENT_SUBJECT_GETTER_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.EVENT_SUBJECT_SETTER_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.RPC_IMPL_MASK;
+import static org.onosproject.yangutils.translator.tojava.GeneratedTempFileType.RPC_INTERFACE_MASK;
+import static org.onosproject.yangutils.translator.tojava.JavaAttributeInfo.getAttributeInfoForTheData;
+import static org.onosproject.yangutils.translator.tojava.JavaQualifiedTypeInfo.getQualifiedTypeInfoOfCurNode;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaCodeSnippetGen.getJavaClassDefClose;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateEventFile;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateEventListenerFile;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateEventSubjectFile;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateManagerClassFile;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGenerator.generateServiceInterfaceFile;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaFileGeneratorUtils.getFileObject;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCamelCase;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getCapitalCase;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getEnumJavaAttribute;
+import static org.onosproject.yangutils.translator.tojava.utils.JavaIdentifierSyntax.getSmallCase;
+import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getGetterForClass;
+import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getRpcManagerMethod;
+import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getRpcServiceMethod;
+import static org.onosproject.yangutils.translator.tojava.utils.MethodsGenerator.getSetterForClass;
+import static org.onosproject.yangutils.translator.tojava.utils.TempJavaCodeFragmentFilesUtils.addAnnotationsImports;
+import static org.onosproject.yangutils.translator.tojava.utils.TempJavaCodeFragmentFilesUtils.addListnersImport;
+import static org.onosproject.yangutils.translator.tojava.utils.TempJavaCodeFragmentFilesUtils.closeFile;
+import static org.onosproject.yangutils.utils.UtilConstants.COMMA;
+import static org.onosproject.yangutils.utils.UtilConstants.EMPTY_STRING;
+import static org.onosproject.yangutils.utils.UtilConstants.EVENT_STRING;
+import static org.onosproject.yangutils.utils.UtilConstants.FOUR_SPACE_INDENTATION;
+import static org.onosproject.yangutils.utils.UtilConstants.LISTENER_REG;
+import static org.onosproject.yangutils.utils.UtilConstants.LISTENER_SERVICE;
+import static org.onosproject.yangutils.utils.UtilConstants.NEW_LINE;
+import static org.onosproject.yangutils.utils.UtilConstants.RPC_INPUT_VAR_NAME;
+import static org.onosproject.yangutils.utils.UtilConstants.SLASH;
+import static org.onosproject.yangutils.utils.UtilConstants.VOID;
+import static org.onosproject.yangutils.utils.io.impl.FileSystemUtil.createPackage;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.generateJavaDocForRpc;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.getJavaDoc;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.ENUM_ATTRIBUTE;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.GETTER_METHOD;
+import static org.onosproject.yangutils.utils.io.impl.JavaDocGen.JavaDocType.MANAGER_SETTER_METHOD;
+import static org.onosproject.yangutils.utils.io.impl.YangIoUtils.insertDataIntoJavaFile;
+
+/**
+ * Represents implementation of java service code fragments temporary implementations.
+ * Maintains the temp files required specific for service and manager java snippet generation.
+ */
+public class TempJavaServiceFragmentFiles
+        extends TempJavaFragmentFiles {
+
+    /**
+     * File name for rpc method.
+     */
+    private static final String RPC_INTERFACE_FILE_NAME = "Rpc";
+
+    /**
+     * File name for rpc implementation method.
+     */
+    private static final String RPC_IMPL_FILE_NAME = "RpcImpl";
+
+    /**
+     * File name for event enum temp file.
+     */
+    private static final String EVENT_ENUM_FILE_NAME = "EventEnum";
+
+    /**
+     * File name for event method temp file.
+     */
+    private static final String EVENT_METHOD_FILE_NAME = "EventMethod";
+
+    /**
+     * File name for event subject attribute temp file.
+     */
+    private static final String EVENT_SUBJECT_ATTRIBUTE_FILE_NAME = "EventSubjectAttribute";
+
+    /**
+     * File name for event subject getter temp file.
+     */
+    private static final String EVENT_SUBJECT_GETTER_FILE_NAME = "EventSubjectGetter";
+
+    /**
+     * File name for event subject setter temp file.
+     */
+    private static final String EVENT_SUBJECT_SETTER_FILE_NAME = "EventSubjectSetter";
+
+    /**
+     * File name for generated class file for service
+     * suffix.
+     */
+    private static final String SERVICE_FILE_NAME_SUFFIX = "Service";
+
+    /**
+     * File name for generated class file for manager
+     * suffix.
+     */
+    private static final String MANAGER_FILE_NAME_SUFFIX = "Manager";
+
+    /**
+     * File name for generated class file for special type like union, typedef
+     * suffix.
+     */
+    private static final String EVENT_FILE_NAME_SUFFIX = "Event";
+
+    /**
+     * File name for generated class file for special type like union, typedef
+     * suffix.
+     */
+    private static final String EVENT_LISTENER_FILE_NAME_SUFFIX = "Listener";
+
+    /**
+     * File name for generated class file for special type like union, typedef
+     * suffix.
+     */
+    public static final String EVENT_SUBJECT_NAME_SUFFIX = "EventSubject";
+
+    private static final String JAVA_FILE_EXTENSION = ".java";
+
+    /**
+     * Java file handle for event subject file.
+     */
+    private File eventSubjectJavaFileHandle;
+
+    /**
+     * Java file handle for event listener file.
+     */
+    private File eventListenerJavaFileHandle;
+
+    /**
+     * Java file handle for event file.
+     */
+    private File eventJavaFileHandle;
+
+    /**
+     * Temporary file handle for rpc interface.
+     */
+    private File rpcInterfaceTempFileHandle;
+
+    /**
+     * Temporary file handle for rpc manager impl.
+     */
+    private File rpcImplTempFileHandle;
+
+    /**
+     * Java file handle for rpc interface file.
+     */
+    private File serviceInterfaceJavaFileHandle;
+
+    /**
+     * Java file handle for manager impl file.
+     */
+    private File managerJavaFileHandle;
+
+    /**
+     * Java file handle for event enum impl file.
+     */
+    private File eventEnumTempFileHandle;
+
+    /**
+     * Java file handle for event method impl file.
+     */
+    private File eventMethodTempFileHandle;
+
+    /**
+     * Java file handle for event subject attribute file.
+     */
+    private File eventSubjectAttributeTempFileHandle;
+
+    /**
+     * Java file handle for event subject getter impl file.
+     */
+    private File eventSubjectGetterTempFileHandle;
+
+    /**
+     * Java file handle for event subject setter impl file.
+     */
+    private File eventSubjectSetterTempFileHandle;
+
+    /**
+     * Returns rpc method's java file handle.
+     *
+     * @return java file handle
+     */
+    private File getServiceInterfaceJavaFileHandle() {
+        return serviceInterfaceJavaFileHandle;
+    }
+
+    /**
+     * Sets rpc method's java file handle.
+     *
+     * @param serviceInterfaceJavaFileHandle file handle for to rpc method
+     */
+    private void setServiceInterfaceJavaFileHandle(File serviceInterfaceJavaFileHandle) {
+        this.serviceInterfaceJavaFileHandle = serviceInterfaceJavaFileHandle;
+    }
+
+    /**
+     * Returns managers java file handle.
+     *
+     * @return java file handle
+     */
+    public File getManagerJavaFileHandle() {
+        return managerJavaFileHandle;
+    }
+
+    /**
+     * Sets manager java file handle.
+     *
+     * @param managerJavaFileHandle file handle for to manager
+     */
+    public void setManagerJavaFileHandle(File managerJavaFileHandle) {
+        this.managerJavaFileHandle = managerJavaFileHandle;
+    }
+
+    /**
+     * Returns rpc method's temporary file handle.
+     *
+     * @return temporary file handle
+     */
+    public File getRpcInterfaceTempFileHandle() {
+        return rpcInterfaceTempFileHandle;
+    }
+
+    /**
+     * Sets rpc method's temporary file handle.
+     *
+     * @param rpcInterfaceTempFileHandle file handle for to rpc method
+     */
+    private void setRpcInterfaceTempFileHandle(File rpcInterfaceTempFileHandle) {
+        this.rpcInterfaceTempFileHandle = rpcInterfaceTempFileHandle;
+    }
+
+    /**
+     * Retrieves the manager impl temp file.
+     *
+     * @return the manager impl temp file
+     */
+    public File getRpcImplTempFileHandle() {
+        return rpcImplTempFileHandle;
+    }
+
+    /**
+     * Sets the manager impl temp file.
+     *
+     * @param rpcImplTempFileHandle the manager impl temp file
+     */
+    public void setRpcImplTempFileHandle(File rpcImplTempFileHandle) {
+        this.rpcImplTempFileHandle = rpcImplTempFileHandle;
+    }
+
+    /**
+     * Returns event's java file handle.
+     *
+     * @return java file handle
+     */
+    private File getEventJavaFileHandle() {
+        return eventJavaFileHandle;
+    }
+
+    /**
+     * Sets event's java file handle.
+     *
+     * @param eventJavaFileHandle file handle for event
+     */
+    private void setEventJavaFileHandle(File eventJavaFileHandle) {
+        this.eventJavaFileHandle = eventJavaFileHandle;
+    }
+
+    /**
+     * Returns event listeners's java file handle.
+     *
+     * @return java file handle
+     */
+    private File getEventListenerJavaFileHandle() {
+        return eventListenerJavaFileHandle;
+    }
+
+    /**
+     * Sets event's java file handle.
+     *
+     * @param eventListenerJavaFileHandle file handle for event
+     */
+    private void setEventListenerJavaFileHandle(File eventListenerJavaFileHandle) {
+        this.eventListenerJavaFileHandle = eventListenerJavaFileHandle;
+    }
+
+    /**
+     * Returns event subject's java file handle.
+     *
+     * @return java file handle
+     */
+    private File getEventSubjectJavaFileHandle() {
+        return eventSubjectJavaFileHandle;
+    }
+
+    /**
+     * Sets event's subject java file handle.
+     *
+     * @param eventSubjectJavaFileHandle file handle for event's subject
+     */
+    private void setEventSubjectJavaFileHandle(File eventSubjectJavaFileHandle) {
+        this.eventSubjectJavaFileHandle = eventSubjectJavaFileHandle;
+    }
+
+    /**
+     * Creates an instance of temporary java code fragment.
+     *
+     * @param javaFileInfo generated file information
+     * @throws IOException when fails to create new file handle
+     */
+    public TempJavaServiceFragmentFiles(JavaFileInfo javaFileInfo)
+            throws IOException {
+        super(javaFileInfo);
+
+        addGeneratedTempFile(RPC_INTERFACE_MASK);
+        addGeneratedTempFile(RPC_IMPL_MASK);
+
+        addGeneratedTempFile(EVENT_ENUM_MASK);
+        addGeneratedTempFile(EVENT_METHOD_MASK);
+        addGeneratedTempFile(EVENT_SUBJECT_ATTRIBUTE_MASK);
+        addGeneratedTempFile(EVENT_SUBJECT_GETTER_MASK);
+        addGeneratedTempFile(EVENT_SUBJECT_SETTER_MASK);
+
+        setRpcInterfaceTempFileHandle(getTemporaryFileHandle(RPC_INTERFACE_FILE_NAME));
+        setRpcImplTempFileHandle(getTemporaryFileHandle(RPC_IMPL_FILE_NAME));
+
+        setEventEnumTempFileHandle(getTemporaryFileHandle(EVENT_ENUM_FILE_NAME));
+        setEventMethodTempFileHandle(getTemporaryFileHandle(EVENT_METHOD_FILE_NAME));
+        setEventSubjectAttributeTempFileHandle(getTemporaryFileHandle(EVENT_SUBJECT_ATTRIBUTE_FILE_NAME));
+        setEventSubjectGetterTempFileHandle(getTemporaryFileHandle(EVENT_SUBJECT_GETTER_FILE_NAME));
+        setEventSubjectSetterTempFileHandle(getTemporaryFileHandle(EVENT_SUBJECT_SETTER_FILE_NAME));
+    }
+
+    /**
+     * Constructs java code exit.
+     *
+     * @param fileType generated file type
+     * @param curNode  current YANG node
+     * @throws IOException when fails to generate java files
+     */
+    @Override
+    public void generateJavaFile(int fileType, YangNode curNode)
+            throws IOException {
+        List<String> imports = getJavaImportData().getImports();
+
+        createPackage(curNode);
+
+        boolean isNotification = false;
+        if (curNode instanceof YangJavaModule) {
+            if (!((YangJavaModule) curNode).getNotificationNodes().isEmpty()) {
+                isNotification = true;
+            }
+        } else if (curNode instanceof YangJavaSubModule) {
+            if (!((YangJavaSubModule) curNode).getNotificationNodes().isEmpty()) {
+                isNotification = true;
+            }
+        }
+
+        if (isNotification) {
+            addListnersImport(curNode, imports, true, LISTENER_SERVICE);
+        }
+        /**
+         * Creates rpc interface file.
+         */
+        setServiceInterfaceJavaFileHandle(getJavaFileHandle(getJavaClassName(SERVICE_FILE_NAME_SUFFIX)));
+        generateServiceInterfaceFile(getServiceInterfaceJavaFileHandle(), curNode, imports, isAttributePresent());
+
+        if (isNotification) {
+            addListnersImport(curNode, imports, false, LISTENER_SERVICE);
+            addListnersImport(curNode, imports, true, LISTENER_REG);
+        }
+        addAnnotationsImports(imports, true);
+        /**
+         * Create builder class file.
+         */
+        setManagerJavaFileHandle(getJavaFileHandle(getJavaClassName(MANAGER_FILE_NAME_SUFFIX)));
+        generateManagerClassFile(getManagerJavaFileHandle(), imports, curNode, isAttributePresent());
+
+        insertDataIntoJavaFile(getManagerJavaFileHandle(), getJavaClassDefClose());
+        if (isNotification) {
+            addListnersImport(curNode, imports, false, LISTENER_REG);
+        }
+        addAnnotationsImports(imports, false);
+
+        if (isNotification) {
+            generateEventJavaFile(GENERATE_EVENT_CLASS, curNode);
+            generateEventListenerJavaFile(GENERATE_EVENT_LISTENER_INTERFACE, curNode);
+            generateEventSubjectJavaFile(GENERATE_EVENT_SUBJECT_CLASS, curNode);
+        }
+
+        /**
+         * Close all the file handles.
+         */
+        freeTemporaryResources(false);
+    }
+
+    /**
+     * Adds rpc string information to applicable temp file.
+     *
+     * @param javaAttributeInfoOfInput  rpc's input node attribute info
+     * @param javaAttributeInfoOfOutput rpc's output node attribute info
+     * @param rpcName                   name of the rpc function
+     * @param pluginConfig              plugin configurations
+     * @throws IOException IO operation fail
+     */
+    private void addRpcString(JavaAttributeInfo javaAttributeInfoOfInput,
+            JavaAttributeInfo javaAttributeInfoOfOutput, YangPluginConfig pluginConfig,
+            String rpcName)
+            throws IOException {
+        String rpcInput = EMPTY_STRING;
+        String rpcOutput = VOID;
+        String rpcInputJavaDoc = EMPTY_STRING;
+        if (javaAttributeInfoOfInput != null) {
+            rpcInput = getCapitalCase(javaAttributeInfoOfInput.getAttributeName());
+        }
+        if (javaAttributeInfoOfOutput != null) {
+            rpcOutput = getCapitalCase(javaAttributeInfoOfOutput.getAttributeName());
+        }
+        if (!rpcInput.equals(EMPTY_STRING)) {
+            rpcInputJavaDoc = RPC_INPUT_VAR_NAME;
+        }
+        appendToFile(getRpcInterfaceTempFileHandle(),
+                generateJavaDocForRpc(rpcName, rpcInputJavaDoc, rpcOutput, pluginConfig)
+                        + getRpcServiceMethod(rpcName, rpcInput, rpcOutput, pluginConfig) + NEW_LINE);
+        appendToFile(getRpcImplTempFileHandle(),
+                getRpcManagerMethod(rpcName, rpcInput, rpcOutput, pluginConfig) + NEW_LINE);
+    }
+
+    /**
+     * Adds the JAVA rpc snippet information.
+     *
+     * @param javaAttributeInfoOfInput  rpc's input node attribute info
+     * @param javaAttributeInfoOfOutput rpc's output node attribute info
+     * @param pluginConfig              plugin configurations
+     * @param rpcName                   name of the rpc function
+     * @throws IOException IO operation fail
+     */
+    public void addJavaSnippetInfoToApplicableTempFiles(JavaAttributeInfo javaAttributeInfoOfInput,
+            JavaAttributeInfo javaAttributeInfoOfOutput, YangPluginConfig pluginConfig,
+            String rpcName)
+            throws IOException {
+        addRpcString(javaAttributeInfoOfInput, javaAttributeInfoOfOutput, pluginConfig, rpcName);
+    }
+
+    /**
+     * Constructs java code exit.
+     *
+     * @param fileType generated file type
+     * @param curNode  current YANG node
+     * @throws IOException when fails to generate java files
+     */
+    public void generateEventJavaFile(int fileType, YangNode curNode)
+            throws IOException {
+
+        List<String> imports = new ArrayList<>();
+
+        imports.add(getJavaImportData().getAbstractEventsImport());
+        String curNodeInfo = getCapitalCase(((JavaFileInfoContainer) curNode).getJavaFileInfo().getJavaName());
+        String nodeName = curNodeInfo + EVENT_STRING;
+
+        addEnumMethod(nodeName, curNodeInfo + EVENT_SUBJECT_NAME_SUFFIX);
+
+        /**
+         * Creates event interface file.
+         */
+        setEventJavaFileHandle(getJavaFileHandle(curNode, curNodeInfo + EVENT_FILE_NAME_SUFFIX));
+        generateEventFile(getEventJavaFileHandle(), curNode, imports);
+
+        /**
+         * Close all the file handles.
+         */
+        freeTemporaryResources(false);
+    }
+
+    /**
+     * Constructs java code exit.
+     *
+     * @param fileType generated file type
+     * @param curNode  current YANG node
+     * @throws IOException when fails to generate java files
+     */
+    public void generateEventListenerJavaFile(int fileType, YangNode curNode)
+            throws IOException {
+
+        List<String> imports = new ArrayList<>();
+
+        imports.add(getJavaImportData().getEventListenerImport());
+        String curNodeInfo = getCapitalCase(((JavaFileInfoContainer) curNode)
+                .getJavaFileInfo().getJavaName());
+        /**
+         * Creates event listener interface file.
+         */
+        setEventListenerJavaFileHandle(
+                getJavaFileHandle(curNode, curNodeInfo + EVENT_LISTENER_FILE_NAME_SUFFIX));
+        generateEventListenerFile(getEventListenerJavaFileHandle(), curNode, imports);
+
+        /**
+         * Close all the file handles.
+         */
+        freeTemporaryResources(false);
+    }
+
+    /**
+     * Constructs java code exit.
+     *
+     * @param fileType generated file type
+     * @param curNode  current YANG node
+     * @throws IOException when fails to generate java files
+     */
+    public void generateEventSubjectJavaFile(int fileType, YangNode curNode)
+            throws IOException {
+
+        String curNodeInfo = getCapitalCase(((JavaFileInfoContainer) curNode)
+                .getJavaFileInfo().getJavaName());
+        /**
+         * Creates event interface file.
+         */
+        setEventSubjectJavaFileHandle(getJavaFileHandle(curNode, curNodeInfo +
+                EVENT_SUBJECT_NAME_SUFFIX));
+        generateEventSubjectFile(getEventSubjectJavaFileHandle(), curNode);
+
+        /**
+         * Close all the file handles.
+         */
+        freeTemporaryResources(false);
+    }
+
+    /**
+     * Removes all temporary file handles.
+     *
+     * @param isErrorOccurred when translator fails to generate java files we
+     *                        need to close all open file handles include temporary files
+     *                        and java files.
+     * @throws IOException when failed to delete the temporary files
+     */
+    @Override
+    public void freeTemporaryResources(boolean isErrorOccurred)
+            throws IOException {
+        boolean isError = isErrorOccurred;
+
+        closeFile(getServiceInterfaceJavaFileHandle(), isError);
+        closeFile(getManagerJavaFileHandle(), isError);
+
+        if (getEventJavaFileHandle() != null) {
+            closeFile(getEventJavaFileHandle(), isError);
+        }
+        if (getEventListenerJavaFileHandle() != null) {
+            closeFile(getEventListenerJavaFileHandle(), isError);
+        }
+        if (getEventSubjectJavaFileHandle() != null) {
+            closeFile(getEventSubjectJavaFileHandle(), isError);
+        }
+
+        closeFile(getRpcInterfaceTempFileHandle(), true);
+        closeFile(getRpcImplTempFileHandle(), true);
+        closeFile(getGetterInterfaceTempFileHandle(), true);
+        closeFile(getSetterInterfaceTempFileHandle(), true);
+        closeFile(getSetterImplTempFileHandle(), true);
+
+        super.freeTemporaryResources(isErrorOccurred);
+
+    }
+
+    /**
+     * Returns event enum temp file.
+     *
+     * @return event enum temp file
+     */
+    public File getEventEnumTempFileHandle() {
+        return eventEnumTempFileHandle;
+    }
+
+    /**
+     * Sets event enum temp file.
+     *
+     * @param eventEnumTempFileHandle event enum temp file
+     */
+    public void setEventEnumTempFileHandle(File eventEnumTempFileHandle) {
+        this.eventEnumTempFileHandle = eventEnumTempFileHandle;
+    }
+
+    /**
+     * Returns event method temp file.
+     *
+     * @return event method temp file
+     */
+    public File getEventMethodTempFileHandle() {
+        return eventMethodTempFileHandle;
+    }
+
+    /**
+     * Sets event method temp file.
+     *
+     * @param eventMethodTempFileHandle event method temp file
+     */
+    public void setEventMethodTempFileHandle(File eventMethodTempFileHandle) {
+        this.eventMethodTempFileHandle = eventMethodTempFileHandle;
+    }
+
+    /**
+     * Returns event subject attribute temp file.
+     *
+     * @return event subject attribute temp file
+     */
+    public File getEventSubjectAttributeTempFileHandle() {
+        return eventSubjectAttributeTempFileHandle;
+    }
+
+    /**
+     * Sets event subject attribute temp file.
+     *
+     * @param eventSubjectAttributeTempFileHandle event subject attribute temp file
+     */
+    public void setEventSubjectAttributeTempFileHandle(File eventSubjectAttributeTempFileHandle) {
+        this.eventSubjectAttributeTempFileHandle = eventSubjectAttributeTempFileHandle;
+    }
+
+    /**
+     * Returns event subject getter temp file.
+     *
+     * @return event subject getter temp file
+     */
+    public File getEventSubjectGetterTempFileHandle() {
+        return eventSubjectGetterTempFileHandle;
+    }
+
+    /**
+     * Sets event subject getter temp file.
+     *
+     * @param eventSubjectGetterTempFileHandle event subject getter temp file
+     */
+    public void setEventSubjectGetterTempFileHandle(File eventSubjectGetterTempFileHandle) {
+        this.eventSubjectGetterTempFileHandle = eventSubjectGetterTempFileHandle;
+    }
+
+    /**
+     * Returns event subject setter temp file.
+     *
+     * @return event subject setter temp file
+     */
+    public File getEventSubjectSetterTempFileHandle() {
+        return eventSubjectSetterTempFileHandle;
+    }
+
+    /**
+     * Sets event subject setter temp file.
+     *
+     * @param eventSubjectSetterTempFileHandle event subject setter temp file
+     */
+    public void setEventSubjectSetterTempFileHandle(File eventSubjectSetterTempFileHandle) {
+        this.eventSubjectSetterTempFileHandle = eventSubjectSetterTempFileHandle;
+    }
+
+    /**
+     * Adds java snippet for events to event subject file.
+     *
+     * @param curNode      current node
+     * @param pluginConfig plugin configurations
+     * @throws IOException when fails to do IO operations
+     */
+    public void addJavaSnippetOfEvent(YangNode curNode, YangPluginConfig pluginConfig)
+            throws IOException {
+
+        String currentInfo = getCapitalCase(getCamelCase(((YangNotification) curNode).getName(),
+                pluginConfig.getConflictResolver()));
+        String notificationName = ((YangNotification) curNode).getName();
+
+        JavaQualifiedTypeInfo qualifiedTypeInfo = getQualifiedTypeInfoOfCurNode(curNode,
+                getCapitalCase(currentInfo));
+
+        JavaAttributeInfo javaAttributeInfo = getAttributeInfoForTheData(qualifiedTypeInfo, getSmallCase(currentInfo),
+                null, false, false);
+
+        /*Adds java info for event in respective temp files.*/
+        addEventEnum(notificationName, pluginConfig);
+        addEventSubjectAttribute(javaAttributeInfo, pluginConfig);
+        addEventSubjectGetter(javaAttributeInfo, pluginConfig);
+        addEventSubjectSetter(javaAttributeInfo, pluginConfig, currentInfo);
+    }
+
+    /*Adds event to enum temp file.*/
+    private void addEventEnum(String notificationName, YangPluginConfig pluginConfig)
+            throws IOException {
+        appendToFile(getEventEnumTempFileHandle(),
+                getJavaDoc(ENUM_ATTRIBUTE, notificationName, false, pluginConfig) + FOUR_SPACE_INDENTATION
+                        + getEnumJavaAttribute(notificationName).toUpperCase() + COMMA + NEW_LINE);
+    }
+
+    /*Adds event method in event class*/
+    private void addEnumMethod(String eventClassname, String className)
+            throws IOException {
+        appendToFile(getEventMethodTempFileHandle(), getEventFileContents(eventClassname, className));
+    }
+
+    /*Adds event method contents to event file.*/
+    private static String getEventFileContents(String eventClassname, String classname) {
+        return "\n" +
+                "    /**\n" +
+                "     * Creates " + classname + " event with type and subject.\n" +
+                "     *\n" +
+                "     * @param type event type\n" +
+                "     * @param subject subject " + classname + "\n" +
+                "     */\n" +
+                "    public " + eventClassname + "(Type type, " + getCapitalCase(classname) + " subject) {\n" +
+                "        super(type, subject);\n" +
+                "    }\n" +
+                "\n" +
+                "    /**\n" +
+                "     * Creates " + classname + " event with type, subject and time.\n" +
+                "     *\n" +
+                "     * @param type event type\n" +
+                "     * @param subject subject " + classname + "\n" +
+                "     * @param time time of event\n" +
+                "     */\n" +
+                "    public " + eventClassname + "(Type type, " + getCapitalCase(classname)
+                + " subject, long time) {\n" +
+                "        super(type, subject, time);\n" +
+                "    }\n" +
+                "\n";
+    }
+
+    /*Adds events to event subject file.*/
+    private void addEventSubjectAttribute(JavaAttributeInfo attr, YangPluginConfig pluginConfig)
+            throws IOException {
+        appendToFile(getEventSubjectAttributeTempFileHandle(),
+                FOUR_SPACE_INDENTATION + parseAttribute(attr, pluginConfig));
+    }
+
+    /*Adds getter method for event in event subject class.*/
+    private void addEventSubjectGetter(JavaAttributeInfo attr, YangPluginConfig pluginConfig)
+            throws IOException {
+        appendToFile(getEventSubjectGetterTempFileHandle(),
+                getJavaDoc(GETTER_METHOD, getCapitalCase(attr.getAttributeName()), false, pluginConfig)
+                        + getGetterForClass(attr, GENERATE_EVENT_SUBJECT_CLASS) + NEW_LINE);
+    }
+
+    /*Adds setter method for event in event subject class.*/
+    private void addEventSubjectSetter(JavaAttributeInfo attr, YangPluginConfig pluginConfig, String className)
+            throws IOException {
+        appendToFile(getEventSubjectSetterTempFileHandle(),
+                getJavaDoc(MANAGER_SETTER_METHOD, getCapitalCase(attr.getAttributeName()), false, pluginConfig)
+                        + getSetterForClass(attr, className, GENERATE_EVENT_SUBJECT_CLASS) + NEW_LINE);
+    }
+
+    /**
+     * Returns a temporary file handle for the event's file type.
+     *
+     * @param fileName file name
+     * @return temporary file handle
+     * @throws IOException when fails to create new file handle
+     */
+    private File getJavaFileHandle(YangNode curNode, String name)
+            throws IOException {
+
+        JavaFileInfo parentInfo = ((JavaFileInfoContainer) curNode).getJavaFileInfo();
+
+        return getFileObject(getDirPath(parentInfo), name, JAVA_FILE_EXTENSION,
+                parentInfo);
+    }
+
+    /**
+     * Returns the directory path.
+     *
+     * @return directory path
+     */
+    private String getDirPath(JavaFileInfo parentInfo) {
+        return (parentInfo.getPackageFilePath() + SLASH + parentInfo.getJavaName()).toLowerCase();
+    }
+}