fix: support interfaces in Java and PHP (#183)

Closes #182

tests/neogen/java_javadoc_spec.lua

@@ -0,0 +1,35 @@
+--- Test cases for emmylua
+---
+--- @module 'tests.neogen.lua_spec'
+
+local specs = require('tests.utils.specs')
+
+local function make_emmylua(source, type)
+    return specs.make_docstring(source, 'java', { type = type, annotation_convention = { java = 'javadoc' } })
+end
+
+describe("java: javadoc", function()
+    describe("class", function()
+        it("works with an basic interface", function()
+            local source = [[
+        public interface Entity {
+            @NonNull UUID getId();|cursor|
+        }
+        ]]
+
+            local expected = [[
+        /**
+         * [TODO:description]
+         *
+         */
+        public interface Entity {
+            @NonNull UUID getId();
+        }
+    ]]
+
+            local result = make_emmylua(source, "class")
+
+            assert.equal(expected, result)
+        end)
+    end)
+end)