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

Change-Id: Iacac75e4187aed93ce1754c170a9c19707e5b8c3
diff --git a/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java b/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
new file mode 100644
index 0000000..37b8992
--- /dev/null
+++ b/utils/yangutils/plugin/src/main/java/org/onosproject/yangutils/utils/UtilConstants.java
@@ -0,0 +1,1162 @@
+/*
+ * 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.utils;
+
+import java.io.File;
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * Represents utilities constants which are used while generating java files.
+ */
+public final class UtilConstants {
+
+    /**
+     * JavaDocs for impl class.
+     */
+    public static final String IMPL_CLASS_JAVA_DOC = " * Represents the implementation of ";
+
+    /**
+     * JavaDocs for builder class.
+     */
+    public static final String BUILDER_CLASS_JAVA_DOC = " * Represents the builder implementation of ";
+
+    /**
+     * JavaDocs for interface class.
+     */
+    public static final String INTERFACE_JAVA_DOC = " * Abstraction of an entity which represents the"
+            + " functionality of ";
+
+    /**
+     * JavaDocs for event.
+     */
+    public static final String EVENT_JAVA_DOC = " * Represents event implementation of ";
+
+    /**
+     * JavaDocs for event listener.
+     */
+    public static final String EVENT_LISTENER_JAVA_DOC = " * Abstraction for event listener of ";
+
+    /**
+     * JavaDocs for builder interface class.
+     */
+    public static final String BUILDER_INTERFACE_JAVA_DOC = " * Builder for ";
+
+    /**
+     * JavaDocs for enum class.
+     */
+    public static final String ENUM_CLASS_JAVADOC = " * Represents ENUM data of ";
+
+    /**
+     * JavaDocs for enum attribute.
+     */
+    public static final String ENUM_ATTRIBUTE_JAVADOC = " * Represents ";
+
+    /**
+     * JavaDocs for package info class.
+     */
+    public static final String PACKAGE_INFO_JAVADOC = " * Implementation of YANG node ";
+
+    /**
+     * JavaDocs for package info class.
+     */
+    public static final String PACKAGE_INFO_JAVADOC_OF_CHILD = "'s children nodes";
+
+    /**
+     * JavaDocs's first line.
+     */
+    public static final String JAVA_DOC_FIRST_LINE = "/**\n";
+
+    /**
+     * JavaDocs's last line.
+     */
+    public static final String JAVA_DOC_END_LINE = " */\n";
+
+    /**
+     * JavaDocs's param annotation.
+     */
+    public static final String JAVA_DOC_PARAM = " * @param ";
+
+    /**
+     * JavaDocs's return annotation.
+     */
+    public static final String JAVA_DOC_RETURN = " * @return ";
+
+    /**
+     * JavaDocs's throw annotation.
+     */
+    public static final String JAVA_DOC_THROWS = " * @throws ";
+
+    /**
+     * JavaDocs's description for setter method.
+     */
+    public static final String JAVA_DOC_SETTERS = " * Returns the builder object of ";
+
+    /**
+     * JavaDocs's description for setter method.
+     */
+    public static final String JAVA_DOC_MANAGER_SETTERS = " * Sets the value to attribute ";
+
+    /**
+     * JavaDocs's description for OF method.
+     */
+    public static final String JAVA_DOC_OF = " * Returns the object of ";
+
+    /**
+     * JavaDocs's description for typedef' setter method.
+     */
+    public static final String JAVA_DOC_SETTERS_COMMON = " * Sets the value of ";
+
+    /**
+     * JavaDocs's description for getter method.
+     */
+    public static final String JAVA_DOC_GETTERS = " * Returns the attribute ";
+
+    /**
+     * JavaDocs's description for constructor.
+     */
+    public static final String JAVA_DOC_CONSTRUCTOR = " * Creates an instance of ";
+
+    /**
+     * JavaDocs's description for build method.
+     */
+    public static final String JAVA_DOC_BUILD = " * Builds object of ";
+
+    /**
+     * JavaDocs's return statement for build method.
+     */
+    public static final String JAVA_DOC_BUILD_RETURN = "object of ";
+
+    /**
+     * JavaDocs's statement for builder object.
+     */
+    public static final String BUILDER_OBJECT = "builder object of ";
+
+    /**
+     * JavaDocs's statement for rpc method.
+     */
+    public static final String JAVA_DOC_RPC = " * Service interface of ";
+
+    /**
+     * JavaDocs's statement for rpc's input string.
+     */
+    public static final String RPC_INPUT_STRING = "input of service interface ";
+
+    /**
+     * JavaDocs's statement for rpc's output string.
+     */
+    public static final String RPC_OUTPUT_STRING = "output of service interface ";
+
+    /**
+     * Static attribute for new line.
+     */
+    public static final String NEW_LINE = "\n";
+
+    /**
+     * Static attribute for default.
+     */
+    public static final String DEFAULT = "default";
+
+    /**
+     * Static attribute for multiple new line.
+     */
+    public static final String MULTIPLE_NEW_LINE = "\n\n";
+
+    /**
+     * Static attribute for empty line.
+     */
+    public static final String EMPTY_STRING = "";
+
+    /**
+     * Static attribute for new line with asterisk.
+     */
+    public static final String NEW_LINE_ASTERISK = " *\n";
+
+    /**
+     * Static attribute for period.
+     */
+    public static final String PERIOD = ".";
+
+    /**
+     * Static attribute for parse byte.
+     */
+    public static final String PARSE_BYTE = "parseByte";
+
+    /**
+     * Static attribute for parse boolean.
+     */
+    public static final String PARSE_BOOLEAN = "parseBoolean";
+
+    /**
+     * Static attribute for parse short.
+     */
+    public static final String PARSE_SHORT = "parseShort";
+
+    /**
+     * Static attribute for parse int.
+     */
+    public static final String PARSE_INT = "parseInt";
+
+    /**
+     * Static attribute for parse long.
+     */
+    public static final String PARSE_LONG = "parseLong";
+
+    /**
+     * Static attribute for omit null value.
+     */
+    public static final String OMIT_NULL_VALUE_STRING = "omitNullValues()";
+
+    /**
+     * Static attribute for colan.
+     */
+    public static final String COLAN = ":";
+
+    /**
+     * Static attribute for underscore.
+     */
+    public static final String UNDER_SCORE = "_";
+
+    /**
+     * Static attribute for semi-colan.
+     */
+    public static final String SEMI_COLAN = ";";
+
+    /**
+     * Static attribute for hyphen.
+     */
+    public static final String HYPHEN = "-";
+
+    /**
+     * Static attribute for space.
+     */
+    public static final String SPACE = " ";
+
+    /**
+     * Static attribute for subject.
+     */
+    public static final String SUBJECT = "Subject";
+
+    /**
+     * Static attribute for ListenerRegistry.
+     */
+    public static final String LISTENER_REG = "ListenerRegistry";
+
+    /**
+     * Static attribute for ListenerService.
+     */
+    public static final String LISTENER_SERVICE = "ListenerService";
+
+    /**
+     * Static attribute for listener package.
+     */
+    public static final String ONOS_EVENT_PKG = "org.onosproject.event";
+
+    /**
+     * Static attribute for colon.
+     */
+    public static final String COLON = ":";
+
+    /**
+     * Static attribute for caret.
+     */
+    public static final String CARET = "^";
+
+    /**
+     * Static attribute for input string.
+     */
+    public static final String INPUT = "input";
+
+    /**
+     * Static attribute for leafref string.
+     */
+    public static final String LEAFREF = "leafref";
+
+    /**
+     * Static attribute for identityref string.
+     */
+    public static final String IDENTITYREF = "identityref";
+
+    /**
+     * Static attribute for instance identifier string.
+     */
+    public static final String INSTANCE_IDENTIFIER = "instance-identifier";
+
+    /**
+     * Static attribute for output variable of rpc.
+     */
+    public static final String RPC_INPUT_VAR_NAME = "inputVar";
+
+    /**
+     * Static attribute for new line.
+     */
+    public static final String EQUAL = "=";
+
+    /**
+     * Static attribute for slash syntax.
+     */
+    public static final String SLASH = File.separator;
+
+    /**
+     * Static attribute for add syntax.
+     */
+    public static final String ADD = "+";
+
+    /**
+     * Static attribute for asterisk.
+     */
+    public static final String ASTERISK = "*";
+
+    /**
+     * Static attribute for at.
+     */
+    public static final String AT = "@";
+
+    /**
+     * Static attribute for quotes.
+     */
+    public static final String QUOTES = "\"";
+
+    /**
+     * Static attribute for ampersand.
+     */
+    public static final String AND = "&";
+
+    /**
+     * Static attribute for comma.
+     */
+    public static final String COMMA = ",";
+
+    /**
+     * Static attribute for add syntax.
+     */
+    public static final String ADD_STRING = "add";
+
+    /**
+     * Static attribute for from syntax.
+     */
+    public static final String FROM_STRING_METHOD_NAME = "fromString";
+
+    /**
+     * Static attribute for check not null syntax.
+     */
+    public static final String CHECK_NOT_NULL_STRING = "checkNotNull";
+
+    /**
+     * Static attribute for hash code syntax.
+     */
+    public static final String HASH_CODE_STRING = "hashCode";
+
+    /**
+     * Static attribute for equals syntax.
+     */
+    public static final String EQUALS_STRING = "equals";
+
+    /**
+     * Static attribute for object.
+     */
+    public static final String OBJECT_STRING = "Object";
+
+    /**
+     * Static attribute for instance of syntax.
+     */
+    public static final String INSTANCE_OF = " instanceof ";
+
+    /**
+     * Static attribute for value syntax.
+     */
+    public static final String VALUE = "value";
+
+    /**
+     * Static attribute for enumValue syntax.
+     */
+    public static final String ENUM_VALUE = "enumValue";
+
+    /**
+     * Static attribute for suffix s.
+     */
+    public static final String SUFFIX_S = "s";
+
+    /**
+     * Static attribute for if.
+     */
+    public static final String IF = "if";
+
+    /**
+     * Static attribute for for.
+     */
+    public static final String FOR = "for";
+
+    /**
+     * Static attribute for while.
+     */
+    public static final String WHILE = "while";
+
+    /**
+     * Static attribute for of.
+     */
+    public static final String OF = "of";
+
+    /**
+     * Static attribute for other.
+     */
+    public static final String OTHER = "other";
+
+    /**
+     * Static attribute for obj syntax.
+     */
+    public static final String OBJ = "obj";
+
+    /**
+     * Static attribute for hash syntax.
+     */
+    public static final String HASH = "hash";
+
+    /**
+     * Static attribute for to syntax.
+     */
+    public static final String TO = "to";
+
+    /**
+     * Static attribute for true syntax.
+     */
+    public static final String TRUE = "true";
+
+    /**
+     * Static attribute for false syntax.
+     */
+    public static final String FALSE = "false";
+
+    /**
+     * Static attribute for org.
+     */
+    public static final String ORG = "org";
+
+    /**
+     * Static attribute for temp.
+     */
+    public static final String TEMP = "temp";
+
+    /**
+     * Static attribute for YANG file directory.
+     */
+    public static final String YANG_RESOURCES = "yang/resources";
+
+    /**
+     * Static attribute for diamond close bracket syntax.
+     */
+    public static final String DIAMOND_OPEN_BRACKET = "<";
+
+    /**
+     * Static attribute for diamond close bracket syntax.
+     */
+    public static final String DIAMOND_CLOSE_BRACKET = ">";
+
+    /**
+     * Static attribute for exception syntax.
+     */
+    public static final String EXCEPTION = "Exception";
+
+    /**
+     * Static attribute for exception variable syntax.
+     */
+    public static final String EXCEPTION_VAR = "e";
+
+    /**
+     * Static attribute for open parenthesis syntax.
+     */
+    public static final String OPEN_PARENTHESIS = "(";
+
+    /**
+     * Static attribute for clear syntax.
+     */
+    public static final String CLEAR = "clear";
+
+    /**
+     * Static attribute for switch syntax.
+     */
+    public static final String SWITCH = "switch";
+
+    /**
+     * Static attribute for case syntax.
+     */
+    public static final String CASE = "case";
+
+    /**
+     * Static attribute for temp val syntax.
+     */
+    public static final String TMP_VAL = "tmpVal";
+
+    /**
+     * From string parameter name.
+     */
+    public static final String FROM_STRING_PARAM_NAME = "valInString";
+
+    /**
+     * Static attribute for close parenthesis syntax.
+     */
+    public static final String CLOSE_PARENTHESIS = ")";
+
+    /**
+     * Static attribute for open curly bracket syntax.
+     */
+    public static final String OPEN_CURLY_BRACKET = "{";
+
+    /**
+     * Static attribute for close curly bracket syntax.
+     */
+    public static final String CLOSE_CURLY_BRACKET = "}";
+
+    /**
+     * Static attribute for getter method prefix.
+     */
+    public static final String GET_METHOD_PREFIX = "get";
+
+    /**
+     * Static attribute for setter method prefix.
+     */
+    public static final String SET_METHOD_PREFIX = "set";
+
+    /**
+     * Static attribute for four space indentation.
+     */
+    public static final String FOUR_SPACE_INDENTATION = "    ";
+
+    /**
+     * Static attribute for not syntax.
+     */
+    public static final String NOT = "!";
+
+    /**
+     * Static attribute for try syntax.
+     */
+    public static final String TRY = "try";
+
+    /**
+     * Static attribute for catch syntax.
+     */
+    public static final String CATCH = "catch";
+
+    /**
+     * Static attribute for eight space indentation.
+     */
+    public static final String EIGHT_SPACE_INDENTATION = FOUR_SPACE_INDENTATION + FOUR_SPACE_INDENTATION;
+
+    /**
+     * Static attribute for twelve space indentation.
+     */
+    public static final String TWELVE_SPACE_INDENTATION = FOUR_SPACE_INDENTATION + EIGHT_SPACE_INDENTATION;
+
+    /**
+     * Static attribute for sixteen space indentation.
+     */
+    public static final String SIXTEEN_SPACE_INDENTATION = EIGHT_SPACE_INDENTATION + EIGHT_SPACE_INDENTATION;
+
+    /**
+     * Static attribute for generated code path.
+     */
+    public static final String YANG_GEN_DIR = "src/main/java/";
+
+    /**
+     * Static attribute for base package.
+     */
+    public static final String DEFAULT_BASE_PKG = "org.onosproject.yang.gen";
+
+    /**
+     * Static attribute for YANG date prefix.
+     */
+    public static final String REVISION_PREFIX = "rev";
+
+    /**
+     * Static attribute for YANG automatic prefix for identifiers with keywords and beginning with digits.
+     */
+    public static final String YANG_AUTO_PREFIX = "yangAutoPrefix";
+
+    /**
+     * Static attribute for YANG version perifx.
+     */
+    public static final String VERSION_PREFIX = "v";
+
+    /**
+     * Static attribute for private modifier.
+     */
+    public static final String PRIVATE = "private";
+
+    /**
+     * Static attribute for public modifier.
+     */
+    public static final String PUBLIC = "public";
+
+    /**
+     * Static attribute for protected modifier.
+     */
+    public static final String PROTECTED = "protected";
+
+    /**
+     * Void java type.
+     */
+    public static final String VOID = "void";
+
+    /**
+     * String built in java type.
+     */
+    public static final String STRING_DATA_TYPE = "String";
+
+    /**
+     * Java.lang.* packages.
+     */
+    public static final String JAVA_LANG = "java.lang";
+
+    /**
+     * Java.math.* packages.
+     */
+    public static final String JAVA_MATH = "java.math";
+
+    /**
+     * Boolean built in java type.
+     */
+    public static final String BOOLEAN_DATA_TYPE = "boolean";
+
+    /**
+     * BigInteger built in java type.
+     */
+    public static final String BIG_INTEGER = "BigInteger";
+
+    /**
+     * Byte java built in type.
+     */
+    public static final String BYTE = "byte";
+
+    /**
+     * Short java built in type.
+     */
+    public static final String SHORT = "short";
+
+    /**
+     * Int java built in type.
+     */
+    public static final String INT = "int";
+
+    /**
+     * Long java built in type.
+     */
+    public static final String LONG = "long";
+
+    /**
+     * Float java built in type.
+     */
+    public static final String FLOAT = "float";
+
+    /**
+     * Double java built in type.
+     */
+    public static final String DOUBLE = "double";
+
+    /**
+     * Boolean built in java wrapper type.
+     */
+    public static final String BOOLEAN_WRAPPER = "Boolean";
+
+    /**
+     * Byte java built in wrapper type.
+     */
+    public static final String BYTE_WRAPPER = "Byte";
+
+    /**
+     * Short java built in wrapper type.
+     */
+    public static final String SHORT_WRAPPER = "Short";
+
+    /**
+     * Integer java built in wrapper type.
+     */
+    public static final String INTEGER_WRAPPER = "Integer";
+
+    /**
+     * Long java built in wrapper type.
+     */
+    public static final String LONG_WRAPPER = "Long";
+
+    /**
+     * YangUint64 java built in wrapper type.
+     */
+    public static final String YANG_UINT64 = "YangUint64";
+
+    /**
+     * List of keywords in java, this is used for checking if the input does not contain these keywords.
+     */
+    public static final List<String> JAVA_KEY_WORDS = Arrays.asList(
+            "abstract", "assert", "boolean", "break", "byte", "case", "catch", "char", "class", "const", "continue",
+            "default", "do", "double", "else", "extends", "false", "final", "finally", "float", "for", "goto", "if",
+            "implements", "import", "instanceof", "int", "interface", "long", "native", "new", "null", "package",
+            "private", "protected", "public", "return", "short", "static", "strictfp", "super", "switch",
+            "synchronized", "this", "throw", "throws", "transient", "true", "try", "void", "volatile", "while");
+
+    /**
+     * Static attribute for regex for all the special characters.
+     */
+    public static final String REGEX_WITH_ALL_SPECIAL_CHAR = "\\p{Punct}+";
+
+    /**
+     * Static attribute for regex for three special characters used in identifier.
+     */
+    public static final String REGEX_FOR_IDENTIFIER_SPECIAL_CHAR = "[. _ -]+";
+
+    /**
+     * Static attribute for regex for period.
+     */
+    public static final String REGEX_FOR_PERIOD = "[.]";
+
+    /**
+     * Static attribute for regex for underscore.
+     */
+    public static final String REGEX_FOR_UNDERSCORE = "[_]";
+
+    /**
+     * Static attribute for regex for hyphen.
+     */
+    public static final String REGEX_FOR_HYPHEN = "[-]";
+
+    /**
+     * Static attribute for regex for digits.
+     */
+    public static final String REGEX_FOR_FIRST_DIGIT = "\\d.*";
+
+    /**
+     * Static attribute for regex with digits.
+     */
+    public static final String REGEX_WITH_DIGITS = "(?=\\d+)";
+
+    /**
+     * Static attribute for regex for single letter.
+     */
+    public static final String REGEX_FOR_SINGLE_LETTER = "[a-zA-Z]";
+
+    /**
+     * Static attribute for regex for digits with single letter.
+     */
+    public static final String REGEX_FOR_DIGITS_WITH_SINGLE_LETTER = "[0-9]+[a-zA-Z]";
+
+    /**
+     * Static attribute for regex with uppercase.
+     */
+    public static final String REGEX_WITH_UPPERCASE = "(?=\\p{Upper})";
+
+    /**
+     * Static attribute for regex for single capital case letter.
+     */
+    public static final String REGEX_WITH_SINGLE_CAPITAL_CASE = "[A-Z]";
+
+    /**
+     * Static attribute for regex for capital case letter with any number of digits and small case letters.
+     */
+    public static final String REGEX_WITH_SINGLE_CAPITAL_CASE_AND_DIGITS_SMALL_CASES = "[A-Z][0-9a-z]+";
+
+    /**
+     * Static attribute for regex for any string ending with service.
+     */
+    public static final String REGEX_FOR_ANY_STRING_ENDING_WITH_SERVICE = ".+Service";
+
+    /**
+     * Static attribute for class syntax.
+     */
+    public static final String CLASS = "class";
+
+    /**
+     * Static attribute for builder syntax.
+     */
+    public static final String BUILDER = "Builder";
+
+    /**
+     * Static attribute for manager syntax.
+     */
+    public static final String MANAGER = "Manager";
+
+    /**
+     * Static attribute for service syntax.
+     */
+    public static final String SERVICE = "Service";
+
+    /**
+     * Static attribute for interface syntax.
+     */
+    public static final String INTERFACE = "interface";
+
+    /**
+     * Static attribute for enum syntax.
+     */
+    public static final String ENUM = "enum";
+
+    /**
+     * Static attribute for type syntax.
+     */
+    public static final String TYPE = "Type";
+
+    /**
+     * Static attribute for static syntax.
+     */
+    public static final String STATIC = "static";
+
+    /**
+     * Static attribute for final syntax.
+     */
+    public static final String FINAL = "final";
+
+    /**
+     * Static attribute for package syntax.
+     */
+    public static final String PACKAGE = "package";
+
+    /**
+     * Static attribute for import syntax.
+     */
+    public static final String IMPORT = "import ";
+
+    /**
+     * Static attribute for null syntax.
+     */
+    public static final String NULL = "null";
+
+    /**
+     * Static attribute for return syntax.
+     */
+    public static final String RETURN = "return";
+
+    /**
+     * Static attribute for java new syntax.
+     */
+    public static final String NEW = "new";
+
+    /**
+     * Static attribute for this syntax.
+     */
+    public static final String THIS = "this";
+
+    /**
+     * Static attribute for implements syntax.
+     */
+    public static final String IMPLEMENTS = "implements";
+
+    /**
+     * Static attribute for extends syntax.
+     */
+    public static final String EXTEND = "extends";
+
+    /**
+     * Static attribute for service interface suffix syntax.
+     */
+    public static final String SERVICE_METHOD_STRING = "Service";
+
+    /**
+     * For event file generation.
+     */
+    public static final String EVENT_STRING = "Event";
+
+    /**
+     * For event listener file generation.
+     */
+    public static final String EVENT_LISTENER_STRING = "Listener";
+
+    /**
+     * For event subject file generation.
+     */
+    public static final String EVENT_SUBJECT_NAME_SUFFIX = "EventSubject";
+
+    /**
+     * Static attribute for impl syntax.
+     */
+    public static final String IMPL = "Impl";
+
+    /**
+     * Static attribute for build method syntax.
+     */
+    public static final String BUILD = "build";
+
+    /**
+     * Static attribute for object.
+     */
+    public static final String OBJECT = "Object";
+
+    /**
+     * Static attribute for override annotation.
+     */
+    public static final String OVERRIDE = "@Override";
+
+    /**
+     * Static attribute for new line.
+     */
+    public static final String COLLECTION_IMPORTS = "java.util";
+
+    /**
+     * Static attribute for more object import package.
+     */
+    public static final String GOOGLE_MORE_OBJECT_IMPORT_PKG = "com.google.common.base";
+
+    /**
+     * Static attribute for more object import class.
+     */
+    public static final String GOOGLE_MORE_OBJECT_IMPORT_CLASS = "MoreObjects;\n";
+
+    /**
+     * Static attribute for to string method.
+     */
+    public static final String GOOGLE_MORE_OBJECT_METHOD_STRING = " MoreObjects.toStringHelper(getClass())";
+
+    /**
+     * Static attribute for java utilities import package.
+     */
+    public static final String JAVA_UTIL_OBJECTS_IMPORT_PKG = "java.util";
+
+    /**
+     * Static attribute for java utilities objects import class.
+     */
+    public static final String JAVA_UTIL_OBJECTS_IMPORT_CLASS = "Objects;\n";
+
+    /**
+     * Static attribute for AugmentationHolder class import package.
+     */
+    public static final String PROVIDED_AUGMENTATION_CLASS_IMPORT_PKG =
+            "org.onosproject.yangutils.utils";
+
+    /**
+     * Static attribute for AugmentationHolder class import class.
+     */
+    public static final String AUGMENTATION_HOLDER_CLASS_IMPORT_CLASS = "AugmentationHolder;\n";
+
+    /**
+     * Static attribute for AugmentedInfo class import package.
+     */
+    public static final String AUGMENTED_INFO_CLASS_IMPORT_PKG = "org.onosproject.yangutils.utils";
+
+    /**
+     * Static attribute for AugmentedInfo class import class.
+     */
+    public static final String AUGMENTED_INFO_CLASS_IMPORT_CLASS = "AugmentedInfo;\n";
+
+    /**
+     * Static attribute for augmentation class.
+     */
+    public static final String AUGMENTATION = "Augmentation";
+
+    /**
+     * Static attribute for AugmentationHolder class.
+     */
+    public static final String AUGMENTATION_HOLDER = "AugmentationHolder";
+
+    /**
+     * Static attribute for AugmentedInfo class.
+     */
+    public static final String AUGMENTED_INFO = "AugmentedInfo";
+
+    /**
+     * Static attribute for augmentable.
+     */
+    public static final String AUGMENTABLE = "Augmentable";
+
+    /**
+     * Static attribute for list.
+     */
+    public static final String LIST = "List";
+
+    /**
+     * Static attribute for array list.
+     */
+    public static final String ARRAY_LIST = "ArrayList";
+
+    /**
+     * Comment to be added for autogenerated impl methods.
+     */
+    public static final String YANG_UTILS_TODO = "//TODO: YANG utils generated code";
+
+    /**
+     * Static attribute for activate annotation.
+     */
+    public static final String ACTIVATE_ANNOTATION = "@Activate\n";
+
+    /**
+     * Static attribute for activate.
+     */
+    public static final String ACTIVATE = "activate";
+
+    /**
+     * Static attribute for activate annotation import.
+     */
+    public static final String ACTIVATE_ANNOTATION_IMPORT = "import org.apache.felix.scr.annotations.Activate;\n";
+
+    /**
+     * Static attribute for deactivate annotation.
+     */
+    public static final String DEACTIVATE_ANNOTATION = "@Deactivate\n";
+
+    /**
+     * Static attribute for deactivate.
+     */
+    public static final String DEACTIVATE = "deactivate";
+
+    /**
+     * Static attribute for deactivate annotation import.
+     */
+    public static final String DEACTIVATE_ANNOTATION_IMPORT =
+            "import org.apache.felix.scr.annotations.Deactivate;\n";
+
+    /**
+     * Static attribute for component annotation.
+     */
+    public static final String COMPONENT_ANNOTATION = "@Component";
+
+    /**
+     * Static attribute for component.
+     */
+    public static final String COMPONENT = "Component";
+
+    /**
+     * Static attribute for immediate.
+     */
+    public static final String IMMEDIATE = "immediate";
+
+    /**
+     * Static attribute for component annotation import.
+     */
+    public static final String COMPONENT_ANNOTATION_IMPORT =
+            "import org.apache.felix.scr.annotations.Component;\n";
+
+    /**
+     * Static attribute for service annotation.
+     */
+    public static final String SERVICE_ANNOTATION = "@Service\n";
+
+    /**
+     * Static attribute for service annotation import.
+     */
+    public static final String SERVICE_ANNOTATION_IMPORT =
+            "import org.apache.felix.scr.annotations.Service;\n";
+
+    /**
+     * Static attribute for logger factory import.
+     */
+    public static final String LOGGER_FACTORY_IMPORT =
+            "import static org.slf4j.LoggerFactory.getLogger;\n";
+
+    /**
+     * Static attribute for logger import.
+     */
+    public static final String LOGGER_IMPORT =
+            "import org.slf4j.Logger;\n";
+
+    /**
+     * Static attribute for logger statement.
+     */
+    public static final String LOGGER_STATEMENT =
+            "\n    private final Logger log = getLogger(getClass());\n";
+
+    /**
+     * Static attribute for logger statement for started.
+     */
+    public static final String STARTED_LOG_INFO =
+            "log.info(\"Started\");\n";
+
+    /**
+     * Static attribute for logger statement for stopped.
+     */
+    public static final String STOPPED_LOG_INFO =
+            "log.info(\"Stopped\");\n";
+
+    /**
+     * Static attribute for AbstractEvent.
+     */
+    public static final String ABSTRACT_EVENT = "AbstractEvent";
+
+    /**
+     * Static attribute for EventListener.
+     */
+    public static final String EVENT_LISTENER = "EventListener";
+
+    /**
+     * Static attribute for YangBinary class.
+     */
+    public static final String YANG_BINARY_CLASS = "YangBinary";
+
+    /**
+     * Static attribute for YangBinary class.
+     */
+    public static final String YANG_BITS_CLASS = "YangBits";
+
+    /**
+     * Static attribute for YANG types package.
+     */
+    public static final String YANG_TYPES_PKG = "org.onosproject.yangutils.datamodel.utils.builtindatatype";
+
+    /**
+     * Static attribute for MathContext class.
+     */
+    public static final String MATH_CONTEXT = "MathContext";
+
+    /**
+     * Static attribute for DECIMAL64 class.
+     */
+    public static final String YANG_DECIMAL64_CLASS = "YangDecimal64";
+
+
+    /**
+     * Static attribute for YANG file error.
+     */
+    public static final String YANG_FILE_ERROR = "YANG file error : ";
+
+    /**
+     * Static attribute for unsupported error information.
+     */
+    public static final String UNSUPPORTED_YANG_CONSTRUCT = " is not supported.";
+
+    /**
+     * Static attribute for currently unsupported error information.
+     */
+    public static final String CURRENTLY_UNSUPPORTED = " is not supported in current version, please check wiki" +
+            " for YANG utils road map.";
+
+    /**
+     * Static attribute for typedef linker error information.
+     */
+    public static final String TYPEDEF_LINKER_ERROR = "YANG file error: Unable to find base "
+            + "typedef for given type";
+
+    /**
+     * Static attribute for grouping linker error information.
+     */
+    public static final String GROUPING_LINKER_ERROR = "YANG file error: Unable to find base "
+            + "grouping for given uses";
+
+    /**
+     * Static attribute for reference.
+     */
+    public static final String REFERENCE = "Reference";
+
+    /**
+     * Static attribute for ReferenceCardinality.
+     */
+    public static final String REFERENCE_CARDINALITY = "ReferenceCardinality";
+
+    /**
+     * Static attribute for jar.
+     */
+    public static final String JAR = "jar";
+
+    /**
+     * Creates an instance of util constants.
+     */
+    private UtilConstants() {
+    }
+}