fixup: apply changes

Signed-off-by: Simon Schrottner <simon.schrottner@dynatrace.com>

.editorconfig

@@ -0,0 +1,72 @@
+root = true
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 4
+indent_style = space
+insert_final_newline = true
+tab_width = 4
+trim_trailing_whitespace = true
+
+ij_continuation_indent_size = 8
+
+[*.md]
+max_line_length = off
+trim_trailing_whitespace = false
+
+# Following the rules of the Google Java Style Guide.
+# See https://google.github.io/styleguide/javaguide.html
+[*.java]
+max_line_length = 120
+
+ij_java_do_not_wrap_after_single_annotation_in_parameter = true
+ij_java_insert_inner_class_imports = false
+ij_java_class_count_to_use_import_on_demand = 999
+ij_java_names_count_to_use_import_on_demand = 999
+ij_java_packages_to_use_import_on_demand = unset
+ij_java_imports_layout = $*,|,*
+ij_java_doc_align_param_comments = true
+ij_java_doc_align_exception_comments = true
+ij_java_doc_add_p_tag_on_empty_lines = false
+ij_java_doc_do_not_wrap_if_one_line = true
+ij_java_doc_keep_empty_parameter_tag = false
+ij_java_doc_keep_empty_throws_tag = false
+ij_java_doc_keep_empty_return_tag = false
+ij_java_doc_preserve_line_breaks = true
+ij_java_doc_indent_on_continuation = true
+ij_java_keep_control_statement_in_one_line = false
+ij_java_keep_blank_lines_in_code = 1
+ij_java_align_multiline_parameters = false
+ij_java_align_multiline_resources = false
+ij_java_align_multiline_for = true
+ij_java_space_before_array_initializer_left_brace = true
+ij_java_call_parameters_wrap = normal
+ij_java_method_parameters_wrap = normal
+ij_java_extends_list_wrap = normal
+ij_java_throws_keyword_wrap = normal
+ij_java_method_call_chain_wrap = normal
+ij_java_binary_operation_wrap = normal
+ij_java_binary_operation_sign_on_next_line = true
+ij_java_ternary_operation_wrap = normal
+ij_java_ternary_operation_signs_on_next_line = true
+ij_java_keep_simple_methods_in_one_line = true
+ij_java_keep_simple_lambdas_in_one_line = true
+ij_java_keep_simple_classes_in_one_line = true
+ij_java_for_statement_wrap = normal
+ij_java_array_initializer_wrap = normal
+ij_java_wrap_comments = true
+ij_java_if_brace_force = always
+ij_java_do_while_brace_force = always
+ij_java_while_brace_force = always
+ij_java_for_brace_force = always
+ij_java_space_after_closing_angle_bracket_in_type_argument = false
+
+[{*.json,*.json5}]
+indent_size = 2
+tab_width = 2
+ij_smart_tabs = false
+
+[*.yaml]
+indent_size = 2
+tab_width = 2

checkstyle.xml

@@ -20,18 +20,15 @@
 
     <property name="charset" value="UTF-8"/>
 
-    <property name="severity" value="${org.checkstyle.google.severity}" default="warning"/>
+    <property name="severity" value="error"/>
 
     <property name="fileExtensions" value="java, properties, xml"/>
     <!-- Excludes all 'module-info.java' files              -->
     <!-- See https://checkstyle.org/filefilters/index.html -->
     <module name="BeforeExecutionExclusionFileFilter">
         <property name="fileNamePattern" value="module\-info\.java$"/>
     </module>
-
-    <module name="SuppressWarningsFilter"/>
-
-    <!-- https://checkstyle.org/filters/suppressionfilter.html -->
+    <!-- https://checkstyle.org/config_filters.html#SuppressionFilter -->
     <module name="SuppressionFilter">
         <property name="file" value="${org.checkstyle.google.suppressionfilter.config}"
                   default="checkstyle-suppressions.xml" />
@@ -58,7 +55,24 @@
         <property name="ignorePattern" value="^package.*|^import.*|a href|href|http://|https://|ftp://"/>
     </module>
 
+    <module name="SuppressWarningsFilter" />
+
     <module name="TreeWalker">
+        <!-- needed for SuppressWarningsFilter -->
+        <module name="SuppressWarningsHolder" />
+
+        <module name="SuppressWarnings">
+            <property name="id" value="checkstyle:suppresswarnings"/>
+        </module>
+
+        <!-- https://checkstyle.org/config_filters.html#SuppressionXpathFilter -->
+        <module name="SuppressionXpathFilter">
+            <property name="file" value="${org.checkstyle.google.suppressionxpathfilter.config}"
+                        default="checkstyle-xpath-suppressions.xml" />
+            <property name="optional" value="true"/>
+        </module>
+
+        <module name="UnusedImports"/>
         <module name="OuterTypeFilename"/>
         <module name="IllegalTokenText">
             <property name="tokens" value="STRING_LITERAL, CHAR_LITERAL"/>
@@ -296,8 +310,9 @@
                                    | //SLIST[not(parent::CASE_GROUP)]/SLIST/RCURLY"/>
         </module>
         <module name="AbbreviationAsWordInName">
-            <property name="ignoreFinal" value="false"/>
-            <property name="allowedAbbreviationLength" value="0"/>
+            <property name="ignoreFinal" value="true"/>
+            <property name="allowedAbbreviations" value="API" />
+            <property name="allowedAbbreviationLength" value="1"/>
             <property name="tokens"
                       value="CLASS_DEF, INTERFACE_DEF, ENUM_DEF, ANNOTATION_DEF, ANNOTATION_FIELD_DEF,
                     PARAMETER_DEF, VARIABLE_DEF, METHOD_DEF, PATTERN_VARIABLE_DEF, RECORD_DEF,
@@ -357,7 +372,6 @@
                       value="^@return the *|^This method returns |^A [{]@code [a-zA-Z0-9]+[}]( is a )"/>
         </module>
         <module name="JavadocParagraph">
-            <property name="allowNewlineParagraph" value="false"/>
         </module>
         <module name="RequireEmptyLineBeforeBlockTagGroup"/>
         <module name="AtclauseOrder">
@@ -373,7 +387,8 @@
             <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF, COMPACT_CTOR_DEF"/>
         </module>
         <module name="MissingJavadocMethod">
-            <property name="scope" value="protected"/>
+            <property name="scope" value="public"/>
+            <property name="minLineCount" value="2"/>
             <property name="allowMissingPropertyJavadoc" value="true"/>
             <property name="allowedAnnotations" value="Override, Test"/>
             <property name="tokens" value="METHOD_DEF, CTOR_DEF, ANNOTATION_FIELD_DEF,